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, 0] (2294)
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A269944: Triangle read by rows, Stirling cycle numbers of order 2, T(n, n) = 1, T(n, k) = 0 if k < 0 or k > n, otherwise T(n, k) = T(n-1, k-1) + (n-1)^2*T(n-1, k), for 0 <= k <= n.
1 · 0, 1 · 0, 1, 1 · 0, 4, 5, 1 … row sums 1, 1, 2, 10, 100, 1700, 44200, 1635400, …
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A027466 → basis A008277
1 · 8, 1 · 64, 17, 1 · 512, 217, 27, 1 … row sums 1, 9, 82, 757, 7087, 67340, 649931, …
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A318772 → x ↦ (1/243)x → basis A008277
1 · 3 · 9 · 27 … row sums 1, 3, 9, 27, 83, 255, 783, 2403, …
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A135838 → basis A013610
1 · 4, 6 · 8, 24, 18 · 32, 144, 216, 108 … row sums 1, 10, 50, 500, 2500, 25000, 125000, …
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A113953 → basis A013609
1 · 1, 2 · 3, 8, 4 · 5, 22, 28, 8 … row sums 1, 3, 15, 63, 279, 1215, 5319, 23247, …
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A120909 → basis A013611
3 · 9, 24 · 27, 144, 192 · 81, 648, 1728, 1536 … row sums 3, 33, 363, 3993, 43923, 483153, …
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A078812 → Veronese 2 (j=1)
1 · 4 · 10, 1 · 20, 8 … row sums 0, 1, 4, 11, 28, 72, 188, 493, …
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A232535 → reverse
1 · 2, 1 · 3, 8, 1 · 4, 25, 18, 1 … row sums 1, 3, 12, 48, 192, 768, 3072, 12288, …
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A038333 → basis A007318
361, 266, 49 · 6859, 7581, 2793, 343 … row sums 676, 17576, 456976, 11881376, …
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A207824 → basis A013610
1 · 6, 3 · 35, 36, 9 · 204, 318, 162, 27 … row sums 1, 9, 80, 711, 6319, 56160, 499121, …
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A133087 → basis A013611
1 · 3, 4 · 4, 16, 16 · 12, 64, 112, 64 … row sums 1, 7, 36, 252, 1296, 9072, 46656, …
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A091044 → basis A013611
1 · 4, 8 · 16, 64, 48 · 64, 384, 640, 256 … row sums 1, 12, 128, 1344, 14080, 147456, …
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A023531 → 2D+1+2n → D
3 · 4, 10 · 0, 12, 21 · 0, 0, 24, 36 … row sums 0, 3, 14, 33, 60, 95, 138, 189, …
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A130123 → D
2 · 0, 8 · 0, 0, 24 · 0, 0, 0, 64 … row sums 0, 2, 8, 24, 64, 160, 384, 896, …
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A207606 → reverse
2, 7, 4 · 2, 11, 16, 5 · 2, 15, 36, 30, 6 … row sums 13, 34, 89, 233, 610, 1597, 4181, …
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A059473 → Veronese 2 (j=1)
2 · 10 · 32, 8 · 88, 88 … row sums 0, 2, 10, 40, 176, 792, 3528, 15680, …
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A145596 → θ+1
1 · 2, 4 · 3, 16, 9 · 4, 40, 60, 16 … row sums 1, 6, 28, 120, 495, 2002, 8008, 31824, …
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A078812 → Veronese 2
1 · 2 · 3, 1 · 4, 6 … row sums 1, 2, 4, 10, 27, 72, 189, 494, …
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A099040 → basis A013609
1 · 2, 4 · 6, 20, 16 · 16, 80, 128, 64 … row sums 1, 6, 42, 288, 1980, 13608, 93528, …
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A207823 → Veronese 2 (j=1)
1 · 8 · 46, 1 · 232, 16 … row sums 0, 1, 8, 47, 248, 1248, 6136, 29809, …
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A126351 → θ+1
1 · 1, 4 · 1, 10, 12 · 1, 18, 57, 32 … row sums 1, 5, 23, 108, 534, 2803, 15623, 92249, …
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A081581 → γ
1 · 1 · 1, 6 · 1, 12 … row sums 1, 1, 7, 13, 55, 133, 463, 1261, …
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A169803: Triangle read by rows: T(n,k) = binomial(n+1-k,k) (n >= 0, 0 <= k <= n).
1 · 1, 1 · 1, 2 · 1, 3, 1 … row sums 1, 2, 3, 5, 8, 13, 21, 34, …
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A081579 → D+1
1 · 2, 1 · 7, 8, 1 · 12, 33, 14, 1 … row sums 1, 3, 16, 60, 240, 896, 3328, 12096, …
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A113953 → basis A008277
1 · 1, 1 · 3, 5, 1 · 5, 19, 10, 1 … row sums 1, 2, 9, 35, 162, 799, 4275, 24448, …
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basis-map coefficients of A026729 → basis A056242 → (θ+1)²
1 · 1, 8 · 1, 20, 36 · 1, 36, 144, 128 … row sums 1, 9, 57, 309, 1530, 7134, 31864, …
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A154986 → basis A013610
1 · 2, 3 · 6, 18, 9 · 24, 108, 126, 27 … row sums 1, 5, 33, 285, 3009, 37845, 550305, …
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A013620: Triangle of coefficients in expansion of (2+3x)^n.
1 · 2, 3 · 4, 12, 9 · 8, 36, 54, 27 … row sums 1, 5, 25, 125, 625, 3125, 15625, 78125, …
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A100861 → reverse → D+1
1 · 1, 1 · 1, 3, 1 · 0, 6, 6, 1 … row sums 1, 2, 5, 13, 38, 116, 382, 1310, …
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A143491 → basis A013609
12, 14, 4 · 60, 94, 48, 8 · 360, 684, 476, 144, 16 … row sums 30, 210, 1680, 15120, 151200, 1663200, …
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A030528 → Veronese 2
1 · 1 · 0, 1 · 0, 3 … row sums 1, 1, 1, 3, 4, 6, 11, 17, …
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A144436 → γ
1 · 1 · 1, 6 · 1, 20 … row sums 1, 1, 7, 21, 115, 585, 3727, 25549, …
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A126216: Triangle read by rows: T(n,k) is the number of Schroeder paths of semilength n containing exactly k peaks but no peaks at level one (n >= 1; 0 <= k <= n-1).
1 · 2, 1 · 5, 5, 1 · 14, 21, 9, 1 … row sums 1, 3, 11, 45, 197, 903, 4279, 20793, …
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A008459 → x ↦ x+1
1 · 2, 1 · 6, 6, 1 · 20, 30, 12, 1 … row sums 1, 3, 13, 63, 321, 1683, 8989, 48639, …
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A011973 → basis A007318 → D
1 · 2 · 5, 2 · 10, 6 … row sums 0, 0, 1, 2, 7, 16, 41, 94, …
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A078812 → basis A013610
1 · 3, 3 · 8, 18, 9 · 21, 75, 81, 27 … row sums 1, 6, 35, 204, 1189, 6930, 40391, …
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A178821 → basis A013611
1 · 10, 20 · 60, 240, 240 · 280, 1680, 3360, 2240 … row sums 1, 30, 540, 7560, 90720, 979776, …
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A120909 → θ+1
3 · 3, 12 · 3, 24, 36 · 3, 36, 108, 96 … row sums 3, 15, 63, 243, 891, 3159, 10935, …
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A001263 → basis A013609
1 · 2, 2 · 5, 10, 4 · 14, 42, 36, 8 … row sums 1, 4, 19, 100, 562, 3304, 20071, …
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A026374 → D+1
1 · 2, 1 · 4, 5, 1 · 5, 12, 7, 1 … row sums 1, 3, 10, 25, 75, 175, 500, 1125, …
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A102662 → Veronese 2
1 · 1 · 1, 3 · 1, 11 … row sums 1, 1, 4, 12, 27, 63, 154, 374, …
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A114687 → basis A008277
1 · 3, 2 · 11, 18, 4 · 45, 140, 72, 8 … row sums 1, 5, 33, 265, 2473, 26037, 303089, …
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A038301 → basis A013611
400, 1760, 1936 · 8000, 52800, 116160, 85184 … row sums 4096, 262144, 16777216, 1073741824, …
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A038322 → basis A013610
1 · 19, 24 · 361, 912, 576 … row sums 1, 43, 1849, 79507, 3418801, 147008443, …
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A169803 → Veronese 2 (j=1)
1 · 2 · 3 · 4 … row sums 0, 1, 2, 3, 4, 6, 10, 17, …
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A081580 → basis A013611
1 · 2, 4 · 9, 36, 16 · 28, 168, 256, 64 … row sums 1, 6, 61, 516, 4621, 40626, 359281, …
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A121574 → basis A013610
1 · 3, 3 · 10, 21, 9 · 33, 105, 99, 27 … row sums 1, 6, 40, 264, 1744, 11520, 76096, …
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A038326 → basis A008277
1 · 23, 12 · 529, 696, 144 … row sums 1, 35, 1369, 59723, 2883889, 152682227, …
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A122431 → D
3, 6, 3 · 1, 6, 9, 4 · 0, 2, 9, 12, 5 … row sums 12, 20, 28, 36, 44, 52, 60, 68, …
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A178822 → x ↦ x+1
1 · 12, 6 · 84, 84, 21 · 448, 672, 336, 56 … row sums 1, 18, 189, 1512, 10206, 61236, 336798, …