Root regions
Nodes grouped by the interval that contains every root of every row (proved, for all n). A node can have several proved regions; the sharpest is the smallest interval.
Nodes with all roots in (-inf, +inf) (332)
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A038326 → Pₙ + Pₙ₊₁
12, 12 · 132, 276, 144 · 1452, 4620, 4896, 1728 … row sums 24, 552, 12696, 292008, 6716184, …
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A144699 → Pₙ + Pₙ₊₁
2, 5 · 2, 21, 25 · 2, 55, 196, 125 … row sums 7, 48, 378, 3360, 33264, 362880, …
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basis-map coefficients of Triangular array of generalized Narayana numbers: T(n, k) = 2*binomial(n + 1, k + 1)*binomial(n + 1, k - 1)/(n + 1).
1 · 0, 2 · -2, 2, 3 · 0, -8, 8, 4 … row sums 1, 2, 3, 4, 5, 6, 7, 8, …
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A165253: Triangle T(n,k), read by rows given by [1,0,1,0,0,0,0,0,0,...] DELTA [0,1,0,0,0,0,0,0,0,...] where DELTA is the operator defined in A084938.
1 · 1 · 1, 1 · 1, 3, 1 … row sums 1, 1, 2, 5, 13, 34, 89, 233, …
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A039991 → D
0, -2 · 0, -6 · 0, -16, 0, 4 · 0, -40, 0, 20 … row sums 0, 0, -2, -6, -12, -20, -30, -42, …
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A290316 → Pₙ + Pₙ₊₁
2, 6 · 2, 54, 90 · 2, 282, 2304, 2160 … row sums 8, 146, 4748, 218906, 13035296, …
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A060920 → θ+1
1 · 2, 2 · 5, 10, 3 · 13, 40, 27, 4 … row sums 1, 4, 18, 84, 390, 1784, 8042, 35804, …
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A122076 → D+1
2 · 5, 2 · 15, 12, 2 · 48, 60, 21, 2 … row sums 2, 7, 29, 131, 601, 2735, 12293, 54619, …
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basis-map coefficients of A145596 → D+1
1 · 2, 2 · 0, 8, 3 · -8, 8, 20, 4 … row sums 1, 4, 11, 24, 45, 76, 119, 176, …
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A039756 → Pₙ + Pₙ₊₁
2, 1 · 2, 5, 1 · 2, 13, 14, 1 · 2, 25, 71, 41, 1 … row sums 3, 8, 30, 140, 764, 4736, 32728, …
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A028338 → x ↦ −2x+3 → Pₙ + Pₙ₊₁
-1, 1 · 4, -4, 1 · -18, 21, -8, 1 … row sums 0, 1, -4, 18, -96, 600, -4320, 35280, …
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A028338 → x ↦ −2x+9 → Pₙ + Pₙ₊₁
-4, 1 · 25, -10, 1 · -180, 96, -17, 1 … row sums -3, 16, -100, 720, -5880, 53760, …
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A144084 → Pₙ + Pₙ₊₁
2, 1 · 2, 5, 2 · 2, 13, 20, 6 · 2, 25, 90, 102, 24 … row sums 3, 9, 41, 243, 1755, 14873, 144249, …
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A142461 → Pₙ + Pₙ₊₁
2, 1 · 2, 15, 1 · 2, 125, 112, 1 … row sums 3, 18, 240, 4704, 120960, 3843840, …
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A039991 → D+1
1 · 1 · 2, -2, -1 · 4, -6, -3 … row sums 1, 1, -1, -5, -11, -19, -29, -41, …
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A267482: Triangle of coefficients of Gaussian polynomials [2n+1,1]_q represented as finite sum of terms (1+q^2)^k*q^(g-k), where k = 0,1,...,g with g=n.
1 · 1, 1 · -1, 1, 1 · -1, -2, 1, 1 … row sums 1, 2, 1, -1, -2, -1, 1, 2, …
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A053123: Triangle of coefficients of shifted Chebyshev's S(n,x-2) = U(n,x/2-1) polynomials (exponents of x in decreasing order).
1 · 1, -2 · 1, -4, 3 · 1, -6, 10, -4 … row sums 1, -1, 0, 1, -1, 0, 1, -1, …
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basis-map coefficients of A112227 → basis A112227
-2, 0, 1 · 0, -6, 0, 1 · 12, 0, -12, 0, 1 … row sums -1, -5, 1, 41, 31, -461, -895, 6481, …
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A257627 → Pₙ + Pₙ₊₁
4, 3 · 12, 63, 9 · 36, 813, 762, 27 … row sums 7, 84, 1638, 43680, 1474200, 60147360, …
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A114656: Triangle read by rows: T(n,k) is the number of double rise-bicolored Dyck paths (double rises come in two colors; also called marked Dyck paths) of semilength n and having k peaks (1 <= k <=…
1 · 2, 1 · 4, 6, 1 · 8, 24, 12, 1 … row sums 1, 3, 11, 45, 197, 903, 4279, 20793, …
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A038330 → Pₙ + Pₙ₊₁
1872, 1824, 592, 64 · 22464, 29376, 14400, 3136, 256 … row sums 4352, 69632, 1114112, 17825792, …
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A053123 → D+1
1 · -1, -2 · -3, 2, 3 · -5, 14, -2, -4 … row sums 1, -3, 2, 3, -7, 4, 5, -11, …
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A173018 → Pₙ + Pₙ₊₁
2 · 2, 1 · 2, 5, 1 · 2, 15, 12, 1 … row sums 2, 3, 8, 30, 144, 840, 5760, 45360, …
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A142460 → Pₙ + Pₙ₊₁
2, 1 · 2, 13, 1 · 2, 95, 84, 1 · 2, 597, 1909, 515, 1 … row sums 3, 16, 182, 3024, 65688, 1759296, …
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A145596: basis-map coefficients of Triangular array of generalized Narayana numbers: T(n, k) = 2*binomial(n + 1, k + 1)*binomial(n + 1, k - 1)/(n + 1). shifted by x -> x + 1
1 · 2, 2 · 3, 8, 3 · 4, 20, 20, 4 … row sums 1, 4, 14, 48, 165, 572, 2002, 7072, …
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A085478: Triangle read by rows: T(n, k) = binomial(n + k, 2*k).
1 · 1, 1 · 1, 3, 1 · 1, 6, 5, 1 … row sums 1, 2, 5, 13, 34, 89, 233, 610, …
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basis-map coefficients of A132812 → D+1
1 · 2, 2 · 0, 9, 3 · -12, 12, 24, 4 … row sums 1, 4, 12, 28, 55, 96, 154, 232, …
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A106800 → Pₙ + Pₙ₊₁
2 · 2, 1 · 2, 4, 1 · 2, 9, 8, 1 … row sums 2, 3, 7, 20, 67, 255, 1080, 5017, …
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A027467 → Pₙ + Pₙ₊₁
16, 1 · 240, 31, 1 · 3600, 705, 46, 1 … row sums 17, 272, 4352, 69632, 1114112, …
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A062196 → Pₙ + Pₙ₊₁
2, 3 · 2, 11, 6 · 2, 23, 36, 10 · 2, 39, 120, 90, 15 … row sums 5, 19, 71, 266, 1002, 3795, 14443, …
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A257611 → Pₙ + Pₙ₊₁
4, 3 · 12, 33, 9 · 36, 243, 222, 27 … row sums 7, 54, 528, 6240, 86400, 1370880, …
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A038323 → Pₙ + Pₙ₊₁
12, 9 · 132, 207, 81 · 1452, 3465, 2754, 729 … row sums 21, 420, 8400, 168000, 3360000, …
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A166340 → Pₙ + Pₙ₊₁
2, 27, 20, 1 · 2, 61, 133, 43, 1 … row sums 50, 240, 1400, 9600, 75600, 672000, …
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A141611: Triangle read by rows: T(n, k) = (n-k+1)*(k+1)*binomial(n, k).
A007318 → −D²+(−1+n)D+1+n1 · 2, 2 · 3, 8, 3 · 4, 18, 18, 4 … row sums 1, 4, 14, 44, 128, 352, 928, 2368, …
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A028338 → x ↦ −2x−1 (shift -1) → Pₙ + Pₙ₊₁
1, 1 · 0, 0, 1 · 0, 1, -2, 1 · 0, -4, 8, -5, 1 … row sums 2, 1, 0, 0, 0, 0, 0, 0, …
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A008955 → Pₙ + Pₙ₊₁
2, 1 · 2, 6, 4 · 2, 19, 53, 36 · 2, 44, 322, 856, 576 … row sums 3, 12, 110, 1800, 45900, 1679600, …
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A008292 → Pₙ + Pₙ₊₁
2, 1 · 2, 5, 1 · 2, 15, 12, 1 · 2, 37, 77, 27, 1 … row sums 3, 8, 30, 144, 840, 5760, 45360, …
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A060920 → (θ+1)²
1 · 2, 4 · 5, 20, 9 · 13, 80, 81, 16 … row sums 1, 6, 34, 190, 1026, 5342, 26962, …
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A038281 → Pₙ + Pₙ₊₁
576, 624, 225, 27 · 4608, 6720, 3672, 891, 81 … row sums 1452, 15972, 175692, 1932612, 21258732, …
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A053117 → D+1
1 · 2, 2 · -1, 8, 4 · -4, -4, 24, 8 … row sums 1, 4, 11, 24, 45, 76, 119, 176, …
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A038226 → Pₙ + Pₙ₊₁
36, 264, 640, 512 · 108, 1080, 4032, 6656, 4096 … row sums 1452, 15972, 175692, 1932612, 21258732, …
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type_b_eulerian → Pₙ + Pₙ₊₁
2, 1 · 2, 7, 1 · 2, 29, 24, 1 · 2, 99, 253, 77, 1 … row sums 3, 10, 56, 432, 4224, 49920, 691200, …
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A131689 → Pₙ + Pₙ₊₁
1, 1 · 0, 2, 2 · 0, 2, 8, 6 · 0, 2, 20, 42, 24 … row sums 2, 4, 16, 88, 616, 5224, 51976, 593128, …
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A013620 → Pₙ + Pₙ₊₁
3, 3 · 6, 15, 9 · 12, 48, 63, 27 … row sums 6, 30, 150, 750, 3750, 18750, 93750, …
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Triangle read by rows: coefficients of a Bessel polynomial recursion: P(x, n) = 2*(n-1)*P(x, n - 1)/x - n*P(x, n - 2) with substitution x -> 1/y.
-2, 0, 2 · 0, -11, 0, 8 · 8, 0, -74, 0, 48 … row sums 0, -3, -18, -129, -1182, -13281, …
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A028338 → x ↦ −x+1 → Pₙ + Pₙ₊₁
-1, 1 · 6, -5, 1 · -40, 38, -11, 1 … row sums 0, 2, -12, 90, -840, 9450, -124740, …
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A375853 → Pₙ + Pₙ₊₁
10, 8 · 28, 64, 20 · 60, 272, 236, 40 … row sums 18, 112, 608, 3072, 14848, 69632, …
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A091044: One half of odd-numbered entries of even-numbered rows of Pascal's triangle A007318.
1 · 2, 2 · 3, 10, 3 · 4, 28, 28, 4 … row sums 1, 4, 16, 64, 256, 1024, 4096, 16384, …
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A038331 → Pₙ + Pₙ₊₁
1872, 2280, 925, 125 · 22464, 36720, 22500, 6125, 625 … row sums 5202, 88434, 1503378, 25557426, …
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A038319 → Pₙ + Pₙ₊₁
1452, 1925, 850, 125 · 15972, 28435, 18975, 5625, 625 … row sums 4352, 69632, 1114112, 17825792, …