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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A038221 → Pₙ + Pₙ₊₁
4, 3 · 12, 21, 9 · 36, 99, 90, 27 … row sums 7, 42, 252, 1512, 9072, 54432, 326592, …
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A163936 → Pₙ + Pₙ₊₁
2 · 3, 1 · 8, 9, 1 · 30, 66, 23, 1 … row sums 2, 4, 18, 120, 1050, 11340, 145530, …
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A053117 → D
2 · 0, 8 · -4, 0, 24 · 0, -24, 0, 64 … row sums 0, 2, 8, 20, 40, 70, 112, 168, …
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A104684: Triangle read by rows: T(n,k) is the number of lattice paths from (0,0) to (n,n) using steps E=(1,0), N=(0,1) and D=(1,1) (i.e., bilateral Schroeder paths), having k D=(1,1) steps.
1 · 2, 1 · 6, 6, 1 · 20, 30, 12, 1 … row sums 1, 3, 13, 63, 321, 1683, 8989, 48639, …
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A028338 → x ↦ −2x+11 → Pₙ + Pₙ₊₁
-5, 1 · 36, -12, 1 · -294, 133, -20, 1 … row sums -4, 25, -180, 1470, -13440, 136080, …
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A172431: Even row Pascal-square read by antidiagonals.
1 · 1, 2 · 1, 4, 3 · 1, 6, 10, 4 … row sums 1, 3, 8, 21, 55, 144, 377, 987, …
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A322944 → Pₙ + Pₙ₊₁
2, 1 · 3, 7, 1 · 8, 44, 16, 1 · 30, 310, 203, 29, 1 … row sums 3, 11, 69, 573, 5799, 68703, 929241, …
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A038325 → Pₙ + Pₙ₊₁
12, 11 · 132, 253, 121 · 1452, 4235, 4114, 1331 … row sums 23, 506, 11132, 244904, 5387888, …
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basis-map coefficients of A132812 → D
2 · 3, 6 · -12, 24, 12 · -20, -40, 90, 20 … row sums 0, 2, 9, 24, 50, 90, 147, 224, …
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A166973 → Pₙ + Pₙ₊₁
2, 1 · 2, 8, 1 · 2, 50, 19, 1 · 2, 302, 259, 35, 1 … row sums 3, 11, 72, 599, 5843, 65696, 836377, …
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A028338 → x ↦ −2x+13 → Pₙ + Pₙ₊₁
-6, 1 · 49, -14, 1 · -448, 176, -23, 1 … row sums -5, 36, -294, 2688, -27216, 302400, …
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A013613 → Pₙ + Pₙ₊₁
2, 6 · 2, 18, 36 · 2, 30, 144, 216 … row sums 8, 56, 392, 2744, 19208, 134456, …
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A225117 → Pₙ + Pₙ₊₁
3, 1 · 6, 14, 1 · 12, 106, 61, 1 … row sums 4, 21, 180, 2106, 31104, 554040, …
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A038338 → Pₙ + Pₙ₊₁
1872, 5472, 5328, 1728 … row sums 14400, 345600, 8294400, 199065600, …
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A225473 → Pₙ + Pₙ₊₁
4, 4 · 12, 44, 32 · 36, 356, 704, 384 … row sums 8, 88, 1480, 33688, 963976, 33191128, …
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A060920 → reverse
1 · 1, 2 · 1, 5, 5 · 1, 9, 20, 13 … row sums 1, 3, 11, 43, 171, 683, 2731, 10923, …
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A038324 → Pₙ + Pₙ₊₁
12, 10 · 132, 230, 100 · 1452, 3850, 3400, 1000 … row sums 22, 462, 9702, 203742, 4278582, …
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A066325 → D+1
1 · 1, 1 · -1, 2, 1 · -3, -3, 3, 1 … row sums 1, 2, 2, -2, -10, -4, 52, 92, …
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A075501 → Pₙ + Pₙ₊₁
252, 270, 37, 1 · 1512, 3492, 936, 61, 1 … row sums 560, 6002, 75320, 1077230, 17165312, …
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A108299 → D
-1 · -1, -2 · -1, -4, 3 · -1, -6, 6, 4 … row sums 0, -1, -3, -2, 3, 7, 4, -5, …
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A007318 → Pₙ + Pₙ₊₁
2, 1 · 2, 3, 1 · 2, 5, 4, 1 · 2, 7, 9, 5, 1 … row sums 3, 6, 12, 24, 48, 96, 192, 384, …
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A257623 → Pₙ + Pₙ₊₁
4, 3 · 12, 51, 9 · 36, 549, 510, 27 … row sums 7, 72, 1122, 23232, 598752, 18450432, …
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A143495 → Pₙ + Pₙ₊₁
4, 1 · 12, 8, 1 · 36, 44, 13, 1 … row sums 5, 21, 94, 449, 2287, 12396, 71295, …
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A028338 → x ↦ (−1/2)x+1 (shift +2) → Pₙ + Pₙ₊₁
-352, 164, -23, 1 · 5760, -3024, 536, -39, 1 … row sums -210, 3234, -62370, 1448370, -39369330, …
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A060187 → 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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A013618 → Pₙ + Pₙ₊₁
2, 55, 484, 1331 · 2, 77, 1089, 6655, 14641 … row sums 1872, 22464, 269568, 3234816, 38817792, …
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A013622 → Pₙ + Pₙ₊₁
4, 5 · 12, 35, 25 · 36, 165, 250, 125 … row sums 9, 72, 576, 4608, 36864, 294912, …
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A257606 → Pₙ + Pₙ₊₁
5, 4 · 20, 44, 16 · 80, 336, 312, 64 … row sums 9, 80, 792, 8640, 102960, 1330560, …
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A028338 → Pₙ + Pₙ₊₁
2, 1 · 4, 5, 1 · 18, 27, 10, 1 · 120, 199, 95, 17, 1 … row sums 3, 10, 56, 432, 4224, 49920, 691200, …
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A114687: 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 double rises (0 …
1 · 1, 2 · 1, 6, 4 · 1, 12, 24, 8 … row sums 1, 3, 11, 45, 197, 903, 4279, 20793, …
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A144696 → Pₙ + Pₙ₊₁
2, 2 · 2, 9, 4 · 2, 25, 37, 8 · 2, 59, 204, 139, 16 … row sums 4, 15, 72, 420, 2880, 22680, 201600, …
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Triangle read by rows: T(n,k) number of tilings of a 2n X 3 grid by dominoes, 2k of which are in a vertical position (0<=k<=n).
1, 6, 4 · 1, 12, 20, 8 · 1, 20, 60, 56, 16 … row sums 11, 41, 153, 571, 2131, 7953, 29681, …
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A038305 → Pₙ + Pₙ₊₁
1100, 960, 279, 27 · 11000, 12900, 5670, 1107, 81 … row sums 2366, 30758, 399854, 5198102, 67575326, …
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A038322 → Pₙ + Pₙ₊₁
12, 8 · 132, 184, 64 · 1452, 3080, 2176, 512 … row sums 20, 380, 7220, 137180, 2606420, …
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A007318 → basis A049020 → Pₙ + Pₙ₊₁
3, 1 · 7, 6, 1 · 20, 27, 10, 1 · 67, 121, 70, 15, 1 … row sums 4, 14, 58, 274, 1442, 8322, 52066, …
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A144697 → Pₙ + Pₙ₊₁
2, 3 · 2, 13, 9 · 2, 35, 76, 27 · 2, 81, 393, 403, 81 … row sums 5, 24, 140, 960, 7560, 67200, 665280, …
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A082985: Coefficient table for Chebyshev's U(2*n,x) polynomial expanded in decreasing powers of (-4*(1-x^2)).
1 · 1, 3 · 1, 5, 5 · 1, 7, 14, 7 … row sums 1, 4, 11, 29, 76, 199, 521, 1364, …
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A028338 → x ↦ −2x+5 → Pₙ + Pₙ₊₁
-2, 1 · 9, -6, 1 · -48, 40, -11, 1 … row sums -1, 4, -18, 96, -600, 4320, -35280, …
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A075504 → Pₙ + Pₙ₊₁
810, 594, 55, 1 · 7290, 11502, 2079, 91, 1 … row sums 1460, 20963, 353063, 6826520, …
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A021012: Triangle of coefficients in expansion of x^n in terms of Laguerre polynomials L_n(x).
basis-map coefficients of A021012 → basis A1305951 · 1, -1 · 2, -4, 2 · 6, -18, 18, -6 … row sums 1, 0, 0, 0, 0, 0, 0, 0, …
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A060821: Triangle read by rows. T(n, k) are the coefficients of the Hermite polynomial of order n, for 0 <= k <= n.
A023531 → basis A0608211 · 0, 2 · -2, 0, 4 · 0, -12, 0, 8 … row sums 1, 2, 2, -4, -20, -8, 184, 464, …
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A066325 → D
1 · 0, 2 · -3, 0, 3 · 0, -12, 0, 4 … row sums 0, 1, 2, 0, -8, -10, 36, 112, …
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A078812: Triangle read by rows: T(n, k) = binomial(n+k-1, 2*k-1).
1 · 2, 1 · 3, 4, 1 · 4, 10, 6, 1 … row sums 1, 3, 8, 21, 55, 144, 377, 987, …
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A053123 → D
-2 · -4, 6 · -6, 20, -12 · -8, 42, -60, 20 … row sums 0, -2, 2, 2, -6, 4, 4, -10, …
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A028338 → x ↦ 2x−3 → Pₙ + Pₙ₊₁
0, 1 · -1, 0, 1 · 0, -2, 1, 1 · 0, -3, -1, 3, 1 … row sums 1, 0, 0, 0, 0, 0, 0, 0, …
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A132812: Triangle read by rows, n>=1, 1<=k<=n, T(n,k) = k*binomial(n,k)^2/(n-k+1).
1 · 2, 2 · 3, 9, 3 · 4, 24, 24, 4 … row sums 1, 4, 15, 56, 210, 792, 3003, 11440, …
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A391533 → Pₙ + Pₙ₊₁
8, 12, 6, 1 · 8, 20, 18, 7, 1 · 8, 28, 38, 25, 8, 1 … row sums 27, 54, 108, 216, 432, 864, 1728, 3456, …
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A156366 → Pₙ + Pₙ₊₁
2, 45, 108, 27 · 2, 111, 693, 729, 81 … row sums 182, 1616, 17360, 218576, 3154352, …
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A257608 → Pₙ + Pₙ₊₁
2, 1 · 2, 21, 1 · 2, 239, 220, 1 … row sums 3, 24, 462, 13200, 497640, 23274240, …
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chebyshev_t
1 · 0, 1 · -1, 0, 2 · 0, -3, 0, 4 … row sums 1, 1, 1, 1, 1, 1, 1, 1, …