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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A028338 → x ↦ −2x−3 → Pₙ + Pₙ₊₁
2, 1 · 1, 2, 1 · 0, 0, 1, 1 · 0, 1, -1, -1, 1 … row sums 3, 4, 2, 0, 0, 0, 0, 0, …
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A257612 → Pₙ + Pₙ₊₁
3, 2 · 6, 26, 4 · 12, 208, 188, 8 … row sums 5, 36, 416, 6528, 129024, 3072000, …
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A257618 → Pₙ + Pₙ₊₁
3, 2 · 6, 42, 4 · 12, 512, 476, 8 … row sums 5, 52, 1008, 27840, 994560, 43545600, …
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A132166 → Pₙ + Pₙ₊₁
4872, 1155, 64, 1 · 58968, 24297, 2394, 85, 1 … row sums 6092, 85745, 1160357, 15434882, …
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A028338 → x ↦ (−2/9)x+1 (shift +2) → Pₙ + Pₙ₊₁
-4212, 864, -53, 1 · 153090, -35559, 2781, -89, 1 … row sums -3400, 120224, -5321680, 283162880, …
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A013611 → Pₙ + Pₙ₊₁
2, 4 · 2, 12, 16 · 2, 20, 64, 64 … row sums 6, 30, 150, 750, 3750, 18750, 93750, …
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A053122 → D
1 · -4, 2 · 10, -12, 3 · -20, 42, -24, 4 … row sums 0, 1, -2, 1, 2, -4, 2, 3, …
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A147716 → Pₙ + Pₙ₊₁
15, 1 · 210, 29, 1 · 2940, 616, 43, 1 … row sums 16, 240, 3600, 54000, 810000, 12150000, …
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A094638 → Pₙ + Pₙ₊₁
2, 1 · 2, 4, 2 · 2, 9, 13, 6 · 2, 16, 46, 56, 24 … row sums 3, 8, 30, 144, 840, 5760, 45360, …
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A257626 → Pₙ + Pₙ₊₁
7, 6 · 42, 114, 36 · 252, 1512, 1440, 216 … row sums 13, 192, 3420, 71280, 1701000, …
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A059364 → x ↦ −x−1 (shift -1) → Pₙ + Pₙ₊₁
2, -1 · 2, -4, 2 · 2, -9, 13, -6 … row sums 1, 0, 0, 0, 0, 0, 0, 0, …
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chebyshev_u → 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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chebyshev_u
1 · 0, 2 · -1, 0, 4 · 0, -4, 0, 8 … row sums 1, 2, 3, 4, 5, 6, 7, 8, …
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A219512 → Pₙ + Pₙ₊₁
2, 3 · 2, 15, 15 · 2, 45, 156, 105 … row sums 5, 32, 308, 3920, 61880, 1164800, …
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A159834: Coefficient array of Hermite_H(n, (x-1)/sqrt(2))/(sqrt(2))^n.
A066325 → x ↦ x−1 (shift -1)1 · -1, 1 · 0, -2, 1 · 2, 0, -3, 1 … row sums 1, 0, -1, 0, 3, 0, -15, 0, …
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A125662: A convolution triangle of numbers based on A001906 (even-indexed Fibonacci numbers).
1 · 3, 1 · 8, 6, 1 · 21, 25, 9, 1 … row sums 1, 4, 15, 56, 209, 780, 2911, 10864, …
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A257619 → Pₙ + Pₙ₊₁
3, 2 · 6, 46, 4 · 12, 608, 568, 8 … row sums 5, 56, 1196, 36608, 1454024, 70928000, …
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A358735: Triangular array read by rows. T(n, k) is the coefficient of x^k in a(n+3) where a(1) = a(2) = a(3) = 1 and a(m+2) = (m*x + 2)*a(m+1) - a(m) for all m in Z.
1 · 1, 1 · 1, 4, 2 · 1, 10, 16, 6 … row sums 1, 2, 7, 33, 191, 1304, 10241, 90865, …
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A156992 → Pₙ + Pₙ₊₁
3, 2 · 8, 14, 6 · 30, 84, 78, 24 … row sums 5, 28, 216, 2112, 24960, 345600, …
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A075499 → Pₙ + Pₙ₊₁
80, 124, 25, 1 · 320, 1072, 424, 41, 1 … row sums 230, 1858, 17478, 186210, 2203174, …
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A142459 → Pₙ + Pₙ₊₁
2, 1 · 2, 11, 1 · 2, 69, 60, 1 · 2, 367, 1121, 309, 1 … row sums 3, 14, 132, 1800, 31920, 695520, …
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A086645: Triangle read by rows: T(n, k) = binomial(2n, 2k).
1 · 1, 1 · 1, 6, 1 · 1, 15, 15, 1 … row sums 1, 2, 8, 32, 128, 512, 2048, 8192, …
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A028246 → Pₙ + Pₙ₊₁
2, 1 · 2, 4, 2 · 2, 10, 14, 6 · 2, 22, 62, 66, 24 … row sums 3, 8, 32, 176, 1232, 10448, 103952, …
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A053122: Triangle of coefficients of Chebyshev's S(n,x-2) = U(n,x/2-1) polynomials (exponents of x in increasing order).
1 · -2, 1 · 3, -4, 1 · -4, 10, -6, 1 … row sums 1, -1, 0, 1, -1, 0, 1, -1, …
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A257607 → Pₙ + Pₙ₊₁
6, 5 · 30, 65, 25 · 150, 595, 560, 125 … row sums 11, 120, 1430, 18480, 257400, 3843840, …
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A060920: Bisection of Fibonacci triangle A037027: even-indexed members of column sequences of A037027 (not counting leading zeros).
1 · 2, 1 · 5, 5, 1 · 13, 20, 9, 1 … row sums 1, 3, 11, 43, 171, 683, 2731, 10923, …
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A356546 → Pₙ + Pₙ₊₁
3, 2 · 8, 14, 6 · 26, 72, 66, 20 … row sums 5, 28, 184, 1280, 9184, 67200, 498432, …
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A038243 → Pₙ + Pₙ₊₁
6, 1 · 30, 11, 1 · 150, 85, 16, 1 … row sums 7, 42, 252, 1512, 9072, 54432, 326592, …
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A021009: Triangle of coefficients of Laguerre polynomials n!*L_n(x) (rising powers of x).
A123202 → x ↦ x/(x+1)1 · 1, -1 · 2, -4, 1 · 6, -18, 9, -1 … row sums 1, 0, -1, -4, -15, -56, -185, -204, …
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A069466: Triangle T(n, k) of numbers of square lattice walks that start and end at origin after 2*n steps and contain exactly k steps to the east, possibly touching origin at intermediate stages.
1 · 2, 2 · 6, 24, 6 · 20, 180, 180, 20 … row sums 1, 4, 36, 400, 4900, 63504, 853776, …
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A327997: Triangle read by rows: coefficients of the polynomials given by KummerU(-n, 1 - n - x, 3).
1 · 3, 1 · 9, 7, 1 · 27, 38, 12, 1 … row sums 1, 4, 17, 78, 393, 2208, 13977, 100026, …
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A334218 → Pₙ + Pₙ₊₁
1, 2 · 0, 5, 3 · 0, 7, 19, 4 · 0, 9, 71, 59, 5 … row sums 3, 8, 30, 144, 840, 5760, 45360, …