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, -1] (188)
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narayana → γ (shift +1) → x ↦ x+1
1 · 1 · 2, 1 · 4, 3 … row sums 1, 1, 3, 7, 21, 61, 191, 603, …
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A135838 → x ↦ x+1
1 · 4, 2 · 8, 8, 2 · 32, 48, 24, 4 … row sums 1, 6, 18, 108, 324, 1944, 5832, 34992, …
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A038220 → basis A007318
1 · 5, 2 · 25, 20, 4 · 125, 150, 60, 8 … row sums 1, 7, 49, 343, 2401, 16807, 117649, …
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A035607 → x ↦ x+1
1 · 1 · 3, 2 · 7, 8, 2 … row sums 1, 1, 5, 17, 61, 217, 773, 2753, …
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A028326 → basis A007318
2 · 4, 2 · 8, 8, 2 · 16, 24, 12, 2 … row sums 2, 6, 18, 54, 162, 486, 1458, 4374, …
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A145597 → basis A007318
1 · 6, 3 · 27, 27, 6 · 110, 165, 75, 10 … row sums 1, 9, 60, 360, 2061, 11529, 63728, …
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A059473 → x ↦ x+1
1 · 4, 2 · 18, 18, 4 · 80, 120, 56, 8 … row sums 1, 6, 40, 264, 1744, 11520, 76096, …
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A008277 → x ↦ x+1
1 · 2, 1 · 5, 5, 1 · 15, 22, 9, 1 … row sums 1, 3, 11, 47, 227, 1215, 7107, 44959, …
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A130850: Triangle read by rows, 0 <= k <= n, T(n,k) = Sum_{j=0..n} A(n,j)*binomial(n-j,k) where A(n,j) are the Eulerian numbers A173018.
A028246 → reverse1 · 1, 1 · 2, 3, 1 · 6, 12, 7, 1 … row sums 1, 2, 6, 26, 150, 1082, 9366, 94586, …
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A008292 → γ (scale 1/4) → x ↦ x+1
1 · 2 · 6, 2 · 24, 16 … row sums 1, 2, 8, 40, 256, 1952, 17408, 177280, …
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A007318 → D+1 → x ↦ x+1
1 · 3, 1 · 8, 6, 1 · 20, 24, 9, 1 … row sums 1, 4, 15, 54, 189, 648, 2187, 7290, …
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A304236 → basis A007318
1 · 1 · 4, 3 · 7, 6 … row sums 1, 1, 7, 13, 55, 133, 463, 1261, …
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A188440 → basis A007318
1 · 1 · 3, 2 · 3, 2 … row sums 1, 1, 5, 5, 25, 25, 125, 125, …
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A081580 → basis A007318
1 · 2, 1 · 9, 9, 1 · 28, 42, 16, 1 … row sums 1, 3, 19, 87, 451, 2223, 11179, 55767, …
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A030528 → basis A007318
1 · 2, 1 · 3, 4, 1 · 5, 10, 6, 1 … row sums 1, 3, 8, 22, 60, 164, 448, 1224, …
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A108838 → ⊙ C(n+1,k+1) (shift +1) → x ↦ x+1
1 · 2, 1 · 6, 6, 1 · 22, 33, 13, 1 … row sums 1, 3, 13, 69, 417, 2763, 19609, 146793, …
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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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A178822 → x ↦ x+1
1 · 12, 6 · 84, 84, 21 · 448, 672, 336, 56 … row sums 1, 18, 189, 1512, 10206, 61236, 336798, …
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A023531 → (1/2)D²+2D+1 → x ↦ x+1
1 · 3, 1 · 6, 6, 1 · 10, 18, 9, 1 … row sums 1, 4, 13, 38, 104, 272, 688, 1696, …
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A334218 → x ↦ x+1
1 · 1 · 2, 2 · 6, 9, 3 … row sums 1, 1, 4, 18, 104, 750, 6492, 65562, …
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A023531 → 2D+1+2n → x ↦ x+1
1 · 5, 3 · 9, 14, 5 · 13, 33, 27, 7 … row sums 1, 8, 28, 80, 208, 512, 1216, 2816, …
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A345013: Triangle read by rows, related to clusters of type D.
A062196 → x ↦ x+11 · 4, 3 · 15, 20, 6 · 56, 105, 60, 10 … row sums 1, 7, 41, 231, 1289, 7183, 40081, …
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A249248 → x ↦ x+1
1 · 4, 3 · 11, 13, 3 · 38, 65, 31, 3 … row sums 1, 7, 27, 137, 681, 3687, 20595, …
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type_b_eulerian → γ (scale 1/4) → x ↦ x+1
1 · 1 · 2, 1 · 6, 5 … row sums 1, 1, 3, 11, 57, 361, 2763, 24611, …
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A178820 → basis A007318
1 · 8, 4 · 40, 40, 10 · 160, 240, 120, 20 … row sums 1, 12, 90, 540, 2835, 13608, 61236, …
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A102662 → x ↦ x+1
1 · 4, 3 · 9, 11, 3 · 22, 38, 20, 3 … row sums 1, 7, 23, 83, 295, 1051, 3743, 13331, …
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A007318 → basis A049020 → x ↦ x+1
1 · 3, 1 · 11, 7, 1 · 47, 43, 12, 1 … row sums 1, 4, 19, 103, 622, 4117, 29521, …
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A052553 → x ↦ x+1
1 · 1 · 2, 1 · 3, 2 … row sums 1, 1, 3, 5, 11, 21, 43, 85, …
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A198954: Expansion of the rotational partition function for a heteronuclear diatomic molecule.
A010054 → D∘x1 · 3 · 5 · 7 … row sums 1, 3, 5, 7, 9, 11, 13, 15, …
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A102547 → reverse → x ↦ x+1
1, 1 · 1, 2, 1 · 1, 3, 3, 1 · 2, 7, 9, 5, 1 … row sums 2, 4, 8, 24, 64, 160, 416, 1088, …
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A007318 → ×(1+2n+n²) → x ↦ x+1
1 · 8, 4 · 36, 36, 9 · 128, 192, 96, 16 … row sums 1, 12, 81, 432, 2025, 8748, 35721, …
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A007318 → ×(−(1/2)n+(1/2)n²) → x ↦ x+1
4, 4, 1 · 24, 36, 18, 3 · 96, 192, 144, 48, 6 … row sums 0, 0, 9, 81, 486, 2430, 10935, 45927, …
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A152842 → x ↦ x+1
1 · 4, 3 · 8, 10, 3 · 32, 64, 42, 9 … row sums 1, 7, 21, 147, 441, 3087, 9261, 64827, …
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A023531 → 2D+1 → x ↦ x+1
1 · 3, 1 · 5, 6, 1 · 7, 15, 9, 1 … row sums 1, 4, 12, 32, 80, 192, 448, 1024, …
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A114656 → basis A007318
1 · 3, 1 · 11, 8, 1 · 45, 51, 15, 1 … row sums 1, 4, 20, 112, 672, 4224, 27456, …
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A100862 → x ↦ x+1
1 · 2, 1 · 5, 5, 1 · 14, 21, 9, 1 … row sums 1, 3, 11, 45, 201, 963, 4899, 26253, …
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A102547 → x ↦ x+1
1 · 1 · 1 · 2, 1 … row sums 1, 1, 1, 3, 5, 7, 13, 23, …
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A172431 → ⊙ C(n,k+1) (shift -1) → x ↦ x+1
1 · 2, 1 · 6, 6, 1 · 21, 32, 13, 1 … row sums 1, 3, 13, 67, 377, 2243, 13877, 88371, …
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narayana → basis A007318
1 · 2, 1 · 5, 5, 1 · 14, 21, 9, 1 … row sums 1, 3, 11, 45, 197, 903, 4279, 20793, …
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A152830 → x ↦ x+1
1 · 1 · 1 · 1 … row sums 1, 1, 1, 1, 3, 3, 3, 3, …
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A064861 → x ↦ x+1
6, 7, 2 · 18, 33, 20, 4 · 36, 84, 73, 28, 4 … row sums 15, 75, 225, 1125, 3375, 16875, 50625, …
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A007318 → (1/3+(1/2)n+(1/6)n²)θ+1+(3/2)n+(1/2)n² → x ↦ x+1
1 · 7, 4 · 32, 36, 10 · 120, 200, 110, 20 … row sums 1, 11, 78, 450, 2295, 10773, 47628, …
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A172431 → basis A007318
1 · 3, 2 · 8, 10, 3 · 21, 38, 22, 4 … row sums 1, 5, 21, 85, 341, 1365, 5461, 21845, …
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basis-map coefficients of Riordan array (1+2x,x(1+x)). shifted by x -> -x + 0
1 · -1, -1 · 1, 2, 1 · -1, -3, -3, -1 … row sums 1, -2, 4, -8, 16, -32, 64, -128, …
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A007318 → θ+1+n → x ↦ x+1
1 · 5, 3 · 16, 18, 5 · 44, 72, 39, 7 … row sums 1, 8, 39, 162, 621, 2268, 8019, 27702, …
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A008292 → x ↦ x+1
1 · 2, 1 · 6, 6, 1 · 24, 36, 14, 1 … row sums 1, 3, 13, 75, 541, 4683, 47293, 545835, …
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A008278 → x ↦ x+1
1 · 2, 1 · 5, 5, 1 · 15, 23, 10, 1 … row sums 1, 3, 11, 49, 257, 1539, 10299, 75905, …
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A137320 → x ↦ x+1
1 · 2, 2 · 6, 10, 4 · 24, 52, 36, 8 … row sums 1, 4, 20, 120, 840, 6720, 60480, …
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A062190 → x ↦ x+1
1 · 7, 6 · 36, 56, 21 · 165, 360, 252, 56 … row sums 1, 13, 113, 833, 5641, 36365, 227305, …