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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A166979 → Pₙ + Pₙ₊₁
2, 122, 31, 1 · 2, 1222, 711, 59, 1 … row sums 156, 1995, 29415, 501288, 9764121, …
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A091042: Triangle of even numbered entries of odd numbered rows of Pascal's triangle A007318.
1 · 1, 3 · 1, 10, 5 · 1, 21, 35, 7 … row sums 1, 4, 16, 64, 256, 1024, 4096, 16384, …
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A038333 → Pₙ + Pₙ₊₁
1872, 3192, 1813, 343 … row sums 7220, 137180, 2606420, 49521980, …
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A008517 → Pₙ + Pₙ₊₁
2, 2 · 2, 10, 6 · 2, 30, 64, 24 … row sums 4, 18, 120, 1050, 11340, 145530, …
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A145597: Generalized Narayana numbers, T(n, k) = 3/(n + 1)*binomial(n + 1, k + 2)*binomial(n + 1, k - 1), triangular array read by rows.
1 · 3, 3 · 6, 15, 6 · 10, 45, 45, 10 … row sums 1, 6, 27, 110, 429, 1638, 6188, 23256, …
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A038336 → Pₙ + Pₙ₊₁
1872, 4560, 3700, 1000 … row sums 11132, 244904, 5387888, 118533536, …
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A038301 → Pₙ + Pₙ₊₁
810, 2871, 3388, 1331 … row sums 8400, 168000, 3360000, 67200000, …
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A257610 → Pₙ + Pₙ₊₁
3, 2 · 6, 22, 4 · 12, 152, 136, 8 … row sums 5, 32, 308, 3920, 61880, 1164800, …
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A267482 → D
1 · 1, 2 · -2, 2, 3 · -2, -6, 3, 4 … row sums 0, 1, 3, 3, -1, -6, -6, 1, …
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A178822 → Pₙ + Pₙ₊₁
7, 6 · 27, 48, 21 · 77, 210, 189, 56 … row sums 13, 96, 532, 2464, 10080, 37632, …
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A156365 → Pₙ + Pₙ₊₁
2, 30, 48, 8 · 2, 74, 308, 216, 16 … row sums 88, 616, 5224, 51976, 593128, 7633096, …
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A027466 → Pₙ + Pₙ₊₁
8, 1 · 56, 15, 1 · 392, 161, 22, 1 … row sums 9, 72, 576, 4608, 36864, 294912, …
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A108299: Triangle read by rows, 0 <= k <= n: T(n,k) = binomial(n-[(k+1)/2],[k/2])*(-1)^[(k+1)/2].
1 · 1, -1 · 1, -1, -1 · 1, -1, -2, 1 … row sums 1, 0, -1, -1, 0, 1, 1, 0, …
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A112007 → Pₙ + Pₙ₊₁
3, 1 · 8, 9, 1 · 30, 66, 23, 1 · 144, 502, 350, 53, 1 … row sums 4, 18, 120, 1050, 11340, 145530, …
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A267482 → D+1
1 · 2, 1 · 0, 3, 1 · -3, 0, 4, 1 … row sums 1, 3, 4, 2, -3, -7, -5, 3, …
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A207824: Triangle of coefficients of Chebyshev's S(n,x+5) polynomials (exponents of x in increasing order).
1 · 5, 1 · 24, 10, 1 · 115, 73, 15, 1 … row sums 1, 6, 35, 204, 1189, 6930, 40391, …
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A001263: Triangle of Narayana numbers T(n,k) = C(n-1,k-1)*C(n,k-1)/k with 1 <= k <= n, read by rows. Also called the Catalan triangle.
1 · 1, 1 · 1, 3, 1 · 1, 6, 6, 1 … row sums 1, 2, 5, 14, 42, 132, 429, 1430, …
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A103327: Triangle read by rows: T(n,k) = binomial(2n+1, 2k+1).
1 · 3, 1 · 5, 10, 1 · 7, 35, 21, 1 … row sums 1, 4, 16, 64, 256, 1024, 4096, 16384, …
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A060920 → D
1 · 5, 2 · 20, 18, 3 · 71, 102, 42, 4 … row sums 0, 1, 7, 41, 219, 1101, 5311, 24881, …
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A232535: Triangle T(n,k), 0 <= k <= n, read by rows defined by: T(n,k) = (binomial(2*n,2*k) + binomial(2*n+1,2*k))/2.
1 · 1, 2 · 1, 8, 3 · 1, 18, 25, 4 … row sums 1, 3, 12, 48, 192, 768, 3072, 12288, …
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A089231 → x ↦ x+1 → Pₙ + Pₙ₊₁
4, 2 · 16, 20, 6 · 86, 174, 114, 24 … row sums 6, 42, 398, 4722, 67062, 1106906, …
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A108838: Triangle of Dyck paths counted by number of long interior inclines.
2 · 3, 2 · 4, 8, 2 · 5, 20, 15, 2 … row sums 2, 5, 14, 42, 132, 429, 1430, 4862, …
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A225466 → Pₙ + Pₙ₊₁
3, 3 · 6, 24, 9 · 12, 138, 144, 27 … row sums 6, 39, 321, 3126, 34737, 430977, …
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A185410 → Pₙ + Pₙ₊₁
2 · 2, 2 · 2, 12, 4 · 2, 46, 64, 8 … row sums 2, 4, 18, 120, 1050, 11340, 145530, …
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A046716: Coefficients of a special case of Poisson-Charlier polynomials.
1 · 1, 1 · 1, 3, 1 · 1, 6, 8, 1 … row sums 1, 2, 5, 16, 65, 326, 1957, 13700, …
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A129533: Array read by antidiagonals: T(n,k) = binomial(n+1,2)*binomial(n+k,n+1) for 0 <= k <= n.
A007318 → (−1/2)D²+(−1/2+(1/2)n)D0, 1 · 0, 3, 3 · 0, 6, 12, 6 · 0, 10, 30, 30, 10 … row sums 0, 0, 1, 6, 24, 80, 240, 672, …
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A269939 → Pₙ + Pₙ₊₁
1, 1 · 0, 2, 3 · 0, 2, 13, 15 · 0, 2, 35, 120, 105 … row sums 2, 5, 30, 262, 2988, 41960, 699240, …
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Triangle, T(n, k) = (1/2)*(n+2)! * [x^k]( p(x, n) ), where p(x,0) = 1, p(x,1) = -x, P(x, n) = (1/(n+1))*( (2*n-x)*P(x, n-1) - n*P(x, n-2) ), read by rows.
-8, -16, 4 · -60, -65, 50, -5 … row sums -20, -80, -192, 784, 19072, 229536, …
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A038277 → Pₙ + Pₙ₊₁
8, 11 · 56, 165, 121 · 392, 1771, 2662, 1331 … row sums 19, 342, 6156, 110808, 1994544, …
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A075500 → Pₙ + Pₙ₊₁
150, 190, 31, 1 · 750, 2050, 655, 51, 1 … row sums 372, 3507, 38627, 483432, 6730397, …
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A225476 → Pₙ + Pₙ₊₁
2, 1 · 2, 5, 2 · 2, 17, 20, 6 · 2, 53, 134, 102, 24 … row sums 3, 9, 45, 315, 2799, 30069, 378585, …
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A075505 → Pₙ + Pₙ₊₁
1100, 730, 61, 1 · 11000, 15700, 2560, 101, 1 … row sums 1892, 29362, 534252, 11180862, …
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A167884 → Pₙ + Pₙ₊₁
2, 1 · 2, 19, 1 · 2, 197, 180, 1 … row sums 3, 22, 380, 9720, 327600, 13684320, …
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A028338 → x ↦ −x (shift -1) → Pₙ + Pₙ₊₁
0, 1 · 2, -3, 1 · -12, 19, -8, 1 … row sums 1, 0, 0, 0, 0, 0, 0, 0, …
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A166344 → Pₙ + Pₙ₊₁
2, 21, 16, 1 · 2, 49, 105, 35, 1 … row sums 40, 192, 1120, 7680, 60480, 537600, …
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A257620 → Pₙ + Pₙ₊₁
4, 3 · 12, 39, 9 · 36, 333, 306, 27 … row sums 7, 60, 702, 10368, 184680, 3849120, …
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A123202: Triangle of coefficients of n!*(1 - x)^n*L_n(x/(1 - x)), where L_n(x) is the Laguerre polynomial.
1 · 1, -2 · 2, -8, 7 · 6, -36, 63, -34 … row sums 1, -1, 1, -1, 1, -1, 1, -1, …
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A039991: Triangle of coefficients of cos(x)^n in polynomial for cos(nx).
1 · 1 · 2, 0, -1 · 4, 0, -3 … row sums 1, 1, 1, 1, 1, 1, 1, 1, …
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A144084 → x ↦ −x (shift -1) → Pₙ + Pₙ₊₁
0, 1 · 0, -3, 2 · 0, 5, -16, 6 · 0, -7, 54, -90, 24 … row sums 1, -1, -5, -19, -71, -241, -389, 6005, …
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A207606: Triangle of coefficients of polynomials u(n,x) jointly generated with A207607; see the Formula section.
4, 7, 2 · 5, 16, 11, 2 · 6, 30, 36, 15, 2 … row sums 13, 34, 89, 233, 610, 1597, 4181, …
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A134991 → Pₙ + Pₙ₊₁
2, 3 · 2, 13, 15 · 2, 35, 120, 105 … row sums 5, 30, 262, 2988, 41960, 699240, …
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A039991 → x ↦ x+1
1 · 1 · 1, -2, -1 · 1, -6, -3 … row sums 1, 1, -2, -8, -8, 16, 64, 64, …
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A108299 → x ↦ x+1
1 · 0, -1 · -1, -3, -1 · -1, -2, 1, 1 … row sums 1, -1, -5, -1, 19, 23, -53, -145, …
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A038291 → Pₙ + Pₙ₊₁
10, 1 · 90, 19, 1 · 810, 261, 28, 1 … row sums 11, 110, 1100, 11000, 110000, 1100000, …
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A038321 → Pₙ + Pₙ₊₁
1452, 2695, 1666, 343 … row sums 6156, 110808, 1994544, 35901792, …
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A028338 → x ↦ −2x+19 → Pₙ + Pₙ₊₁
-9, 1 · 100, -20, 1 · -1210, 341, -32, 1 … row sums -8, 81, -900, 10890, -142560, 2007720, …
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A038337 → Pₙ + Pₙ₊₁
1872, 5016, 4477, 1331 … row sums 12696, 292008, 6716184, 154472232, …
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A038279 → Pₙ + Pₙ₊₁
9, 1 · 72, 17, 1 · 576, 208, 25, 1 … row sums 10, 90, 810, 7290, 65610, 590490, …
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A166341 → Pₙ + Pₙ₊₁
2, 33, 24, 1 · 2, 73, 161, 51, 1 … row sums 60, 288, 1680, 11520, 90720, 806400, …
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A008278 → Pₙ + Pₙ₊₁
2, 1 · 2, 4, 1 · 2, 9, 8, 1 · 2, 16, 32, 16, 1 … row sums 3, 7, 20, 67, 255, 1080, 5017, 25287, …