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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A085841: Triangle: row #n has n+1 terms. T(n,m) = 4^m (2n+1)! / ( (2n-2m)! (2m+1)! ).
1 · 3, 4 · 5, 40, 16 · 7, 140, 336, 64 … row sums 1, 7, 61, 547, 4921, 44287, 398581, …
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A122076: Coefficients of a generalized Jaco-Lucas polynomial (even indices) read by rows.
2 · 3, 2 · 7, 8, 2 · 18, 30, 15, 2 … row sums 2, 5, 17, 65, 257, 1025, 4097, 16385, …
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A110441: Triangular array formed by the Mersenne numbers.
1 · 3, 1 · 7, 6, 1 · 15, 23, 9, 1 … row sums 1, 4, 14, 48, 164, 560, 1912, 6528, …
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A038259 → Pₙ + Pₙ₊₁
7, 5 · 42, 65, 25 · 252, 600, 475, 125 … row sums 12, 132, 1452, 15972, 175692, 1932612, …
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A053123 → x ↦ x+1
1 · -1, -2 · 0, 2, 3 · 1, 2, -2, -4 … row sums 1, -3, 5, -3, -11, 45, -91, 93, …
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A038320 → Pₙ + Pₙ₊₁
1452, 2310, 1224, 216 … row sums 5202, 88434, 1503378, 25557426, …
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A227450 → Pₙ + Pₙ₊₁
4, 4 · 4, 16, 8 · 4, 40, 56, 16 · 4, 88, 248, 176, 32 … row sums 8, 28, 116, 548, 2884, 16644, 104132, …
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A038231 → Pₙ + Pₙ₊₁
5, 1 · 20, 9, 1 · 80, 56, 13, 1 … row sums 6, 30, 150, 750, 3750, 18750, 93750, …
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A257622 → Pₙ + Pₙ₊₁
5, 4 · 20, 60, 16 · 80, 608, 568, 64 … row sums 9, 96, 1320, 22176, 439824, 10053120, …
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A109692 → Pₙ + Pₙ₊₁
2, 1 · 2, 5, 3 · 2, 13, 26, 15 · 2, 25, 109, 191, 105 … row sums 3, 10, 56, 432, 4224, 49920, 691200, …
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A128813 → Pₙ + Pₙ₊₁
2, 1 · 2, 5, 3 · 2, 14, 30, 18 · 2, 30, 154, 306, 180 … row sums 3, 10, 64, 672, 10472, 226688, 6504960, …
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A066325 → x ↦ x−1 (shift -1) → Pₙ + Pₙ₊₁
0, 1 · -1, -1, 1 · 2, -2, -2, 1 · 0, 8, -3, -3, 1 … row sums 1, -1, -1, 3, 3, -15, -15, 105, …
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A178821 → Pₙ + Pₙ₊₁
6, 5 · 20, 35, 15 · 50, 135, 120, 35 … row sums 11, 70, 340, 1400, 5152, 17472, 55680, …
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A027465 → Pₙ + Pₙ₊₁
4, 1 · 12, 7, 1 · 36, 33, 10, 1 · 108, 135, 63, 13, 1 … row sums 5, 20, 80, 320, 1280, 5120, 20480, …
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A053117: Triangle read by rows of coefficients of Chebyshev's U(n,x) polynomials (exponents in increasing order).
1 · 0, 2 · -1, 0, 4 · 0, -4, 0, 8 … row sums 1, 2, 3, 4, 5, 6, 7, 8, …
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A257624 → Pₙ + Pₙ₊₁
6, 5 · 30, 85, 25 · 150, 995, 940, 125 … row sums 11, 140, 2210, 41600, 908960, 22605440, …
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A038255 → Pₙ + Pₙ₊₁
7, 1 · 42, 13, 1 · 252, 120, 19, 1 … row sums 8, 56, 392, 2744, 19208, 134456, …
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A039755 → Pₙ + Pₙ₊₁
2, 1 · 2, 5, 1 · 2, 17, 10, 1 · 2, 53, 67, 17, 1 … row sums 3, 8, 30, 140, 764, 4736, 32728, …
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A085880 → Pₙ + Pₙ₊₁
2, 1 · 3, 5, 2 · 7, 19, 17, 5 · 19, 71, 99, 61, 14 … row sums 3, 10, 48, 264, 1568, 9792, 63360, …
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A038327 → Pₙ + Pₙ₊₁
13, 1 · 156, 25, 1 · 1872, 456, 37, 1 … row sums 14, 182, 2366, 30758, 399854, 5198102, …
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A122076 → D
2 · 8, 4 · 30, 30, 6 · 104, 160, 72, 8 … row sums 0, 2, 12, 66, 344, 1710, 8196, 38234, …
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A112493 → Pₙ + Pₙ₊₁
2, 1 · 2, 5, 3 · 2, 15, 28, 15 · 2, 37, 155, 225, 105 … row sums 3, 10, 60, 524, 5976, 83920, 1398480, …
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A038334 → Pₙ + Pₙ₊₁
1872, 3648, 2368, 512 … row sums 8400, 168000, 3360000, 67200000, …
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A008278 → x ↦ x+1 (shift +1) → Pₙ + Pₙ₊₁
3, 1 · 7, 6, 1 · 20, 28, 11, 1 · 67, 132, 86, 20, 1 … row sums 4, 14, 60, 306, 1796, 11838, 86204, …
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A142075 → Pₙ + Pₙ₊₁
2, 2 · 2, 10, 4 · 2, 30, 48, 8 · 2, 74, 308, 216, 16 … row sums 4, 16, 88, 616, 5224, 51976, 593128, …
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A132013: T(n,j) for an iterated mixed order Laguerre transform. Coefficients of the normalized generalized Laguerre polynomials (-1)^n*n!*L(n,1-n,x).
A023531 → (−1/n)D²+(1/n)D1 · -1, 1 · 0, -2, 1 · 0, 0, -3, 1 … row sums 1, 0, -1, -2, -3, -4, -5, -6, …
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A060920 → x ↦ x/(x+1)
1 · 2, 3 · 5, 15, 11 · 13, 59, 88, 43 … row sums 1, 5, 31, 203, 1345, 8933, 59359, …
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A094645: Triangle of generalized Stirling numbers of the first kind read by rows: T(n, k) = (-1)^(n+k)*Sum_{m=0..n} Stirling1(n, m) * binomial(m, k), where Stirling1 is A048994.
A028338 → x ↦ 2x−31 · -1, 1 · 0, -1, 1 · 0, -1, 0, 1 … row sums 1, 0, 0, 0, 0, 0, 0, 0, …
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A143491 → Pₙ + Pₙ₊₁
30, 31, 10, 1 · 144, 180, 80, 15, 1 … row sums 72, 420, 2880, 22680, 201600, 1995840, …
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A108299 → D+1
1 · 0, -1 · 0, -3, -1 · 0, -5, 1, 1 … row sums 1, -1, -4, -3, 3, 8, 5, -5, …
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A257613 → Pₙ + Pₙ₊₁
5, 4 · 20, 52, 16 · 80, 464, 432, 64 … row sums 9, 88, 1040, 14400, 228480, 4085760, …
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A066325: Hermite he
1 · 0, 1 · -1, 0, 1 · 0, -3, 0, 1 … row sums 1, 1, 0, -2, -2, 6, 16, -20, …
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A142458 → Pₙ + Pₙ₊₁
2, 1 · 2, 9, 1 · 2, 47, 40, 1 · 2, 205, 585, 167, 1 … row sums 3, 12, 90, 960, 13200, 221760, 4398240, …
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A008459: Square the entries of Pascal's triangle.
1 · 1, 1 · 1, 4, 1 · 1, 9, 9, 1 … row sums 1, 2, 6, 20, 70, 252, 924, 3432, …
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A367270: Triangle read by rows. T(n, k) = binomial(n, k)*binomial(n - 1, n - k - 1).
1 · 1 · 1, 2 · 1, 6, 3 … row sums 1, 1, 3, 10, 35, 126, 462, 1716, …
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A193685 → Pₙ + Pₙ₊₁
6, 1 · 30, 12, 1 · 150, 102, 19, 1 … row sums 7, 43, 272, 1775, 11967, 83440, 602045, …
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A126351 → Pₙ + Pₙ₊₁
2, 2 · 2, 7, 4 · 2, 14, 23, 8 · 2, 23, 74, 73, 16 … row sums 4, 13, 47, 188, 825, 3937, 20270, …
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A055356 → Pₙ + Pₙ₊₁
2 · 2, 1 · 2, 5, 2 · 2, 15, 20, 6 … row sums 2, 3, 9, 43, 281, 2321, 23135, 269895, …
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Delannoy paths counted by number of weak peaks.
1, 8, 4 · 1, 18, 36, 8 · 1, 32, 144, 128, 16 … row sums 13, 63, 321, 1683, 8989, 48639, 265729, …
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A257616 → Pₙ + Pₙ₊₁
3, 2 · 6, 34, 4 · 12, 344, 316, 8 … row sums 5, 44, 680, 14720, 408320, 13798400, …
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A028338 → x ↦ −2x+7 → Pₙ + Pₙ₊₁
-3, 1 · 16, -8, 1 · -100, 65, -14, 1 … row sums -2, 9, -48, 300, -2160, 17640, -161280, …
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A075498 → Pₙ + Pₙ₊₁
4, 1 · 12, 10, 1 · 36, 72, 19, 1 … row sums 5, 23, 128, 851, 6557, 57008, 549311, …
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A075497 → Pₙ + Pₙ₊₁
3, 1 · 6, 7, 1 · 12, 34, 13, 1 · 24, 148, 112, 21, 1 … row sums 4, 14, 60, 306, 1796, 11838, 86204, …
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A038335 → Pₙ + Pₙ₊₁
13, 9 · 156, 225, 81 · 1872, 4104, 2997, 729 … row sums 22, 462, 9702, 203742, 4278582, …
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A178820 → Pₙ + Pₙ₊₁
5, 4 · 14, 24, 10 · 30, 80, 70, 20 … row sums 9, 48, 200, 720, 2352, 7168, 20736, …
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A137338 → x ↦ x+1
1 · 0, 1 · -2, -1, 1 · 4, -3, -3, 1 … row sums 1, 1, -2, -1, 10, -25, 40, -25, …
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A062145 → Pₙ + Pₙ₊₁
2, 4 · 2, 14, 10 · 2, 28, 55, 20 … row sums 6, 26, 105, 414, 1617, 6292, 24453, …
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shifted_legendre
-1, 2 · 1, -6, 6 · -1, 12, -30, 20 … row sums 1, 1, 1, 1, 1, 1, 1, 1, …
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A013609 → Pₙ + Pₙ₊₁
2, 2 · 2, 6, 4 · 2, 10, 16, 8 · 2, 14, 36, 40, 16 … row sums 4, 12, 36, 108, 324, 972, 2916, 8748, …
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A257625 → Pₙ + Pₙ₊₁
4, 3 · 12, 57, 9 · 36, 675, 630, 27 … row sums 7, 78, 1368, 32400, 964224, 34525440, …