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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A011973 → basis A007318 → basis A008277
1 · 1 · 3, 1 · 5, 2 … row sums 1, 1, 4, 7, 20, 43, 113, 267, …
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A038329 → basis A013609
225, 180, 36 · 3375, 4050, 1620, 216 … row sums 441, 9261, 194481, 4084101, 85766121, …
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A207823 → basis A013609
1 · 5, 2 · 24, 20, 4 · 115, 146, 60, 8 … row sums 1, 7, 48, 329, 2255, 15456, 105937, …
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A038208 → basis A013610
1 · 4, 6 · 16, 48, 36 · 64, 288, 432, 216 … row sums 1, 10, 100, 1000, 10000, 100000, …
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A207823 → θ+1
1 · 4, 2 · 15, 16, 3 · 56, 92, 36, 4 … row sums 1, 6, 34, 188, 1021, 5468, 28959, …
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A038271 → basis A013609
1 · 12, 10 · 144, 240, 100 · 1728, 4320, 3600, 1000 … row sums 1, 22, 484, 10648, 234256, 5153632, …
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A028338: Triangle of coefficients in expansion of (x+1)*(x+3)*...*(x + 2n - 1) in rising powers of x.
1 · 1, 1 · 3, 4, 1 · 15, 23, 9, 1 … row sums 1, 2, 8, 48, 384, 3840, 46080, 645120, …
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A081581 → basis A008277
1 · 2, 1 · 10, 11, 1 · 32, 67, 21, 1 … row sums 1, 3, 22, 121, 817, 5570, 40985, …
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A008292 → θ+1
1 · 1, 2 · 1, 8, 3 · 1, 22, 33, 4 … row sums 0, 1, 3, 12, 60, 360, 2520, 20160, …
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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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A028326 → D+1
2 · 4, 2 · 6, 8, 2 · 8, 18, 12, 2 … row sums 2, 6, 16, 40, 96, 224, 512, 1152, …
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A052553 → θ+1
1 · 1 · 1, 2 · 1, 4 … row sums 1, 1, 3, 5, 10, 18, 33, 59, …
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A266213 → (θ+1)²
1 · 1 · 1, 8 · 1, 16, 18 … row sums 1, 1, 9, 35, 129, 437, 1409, 4375, …
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A091042 → basis A013609
1 · 4, 6 · 16, 40, 20 · 64, 224, 224, 56 … row sums 1, 10, 76, 568, 4240, 31648, 236224, …
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A038335 → basis A013610
1 · 21, 27 · 441, 1134, 729 … row sums 1, 48, 2304, 110592, 5308416, …
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A114656 → basis A008277
1 · 3, 1 · 11, 9, 1 · 45, 67, 18, 1 … row sums 1, 4, 21, 131, 928, 7275, 62051, …
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A156992 → basis A008277
1 · 4, 2 · 24, 30, 6 · 192, 456, 216, 24 … row sums 1, 6, 60, 888, 18120, 485280, 16445520, …
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A178821 → basis A013609
1 · 10, 10 · 60, 120, 60 · 280, 840, 840, 280 … row sums 1, 20, 240, 2240, 17920, 129024, …
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A274496 → D
2 · 4 · 8, 8 · 16, 16 … row sums 0, 0, 2, 4, 16, 32, 96, 192, …
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A113214 → Veronese 2
1 · 2 · 0, 1 · 0, 4 … row sums 1, 2, 1, 4, 6, 8, 15, 24, …
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A249251 → Veronese 2 (j=1)
3 · 6 · 9, 12 · 12, 60 … row sums 0, 3, 6, 21, 72, 234, 774, 2559, …
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A010054 → reverse → θ+1
1 · 0, 8 · 0, 0, 21 · 0, 0, 0, 40 … row sums 1, 8, 21, 40, 65, 96, 133, 176, …
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A127773: Triangle read by rows: row n consists of n-1 zeros followed by n(n+1)/2.
A010054 → reverse1 · 0, 3 · 0, 0, 6 · 0, 0, 0, 10 … row sums 1, 3, 6, 10, 15, 21, 28, 36, …
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A010054 → reverse → (θ+1)²
1 · 0, 16 · 0, 0, 63 · 0, 0, 0, 160 … row sums 1, 16, 63, 160, 325, 576, 931, 1408, …
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A144438 → D
1 · 5, 2 · 14, 28, 3 · 33, 178, 99, 4 … row sums 0, 1, 7, 45, 314, 2430, 20883, 198310, …
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A110441 → Veronese 2 (j=1)
1 · 6 · 23, 1 · 72, 12 … row sums 0, 1, 6, 24, 84, 284, 960, 3264, …
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A290319 → basis A013610
1 · 2, 3 · 12, 24, 9 · 120, 276, 162, 27 … row sums 1, 5, 45, 585, 9945, 208845, 5221125, …
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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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A120910: Triangle read by rows: T(n,k) is the number of ternary words of length n having k levels (n >= 1, 0 <= k <= n-1). A level is a pair of identical consecutive letters.
3 · 6, 3 · 12, 12, 3 · 24, 36, 18, 3 … row sums 3, 9, 27, 81, 243, 729, 2187, 6561, …
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A038323 → basis A013611
1 · 20, 36 · 400, 1440, 1296 … row sums 1, 56, 3136, 175616, 9834496, …
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A094638 → D+1
1 · 2, 1 · 4, 7, 2 · 7, 28, 29, 6 … row sums 1, 3, 13, 70, 446, 3276, 27252, 253296, …
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A081578 → Veronese 2 (j=1)
1 · 5 · 9, 1 · 13, 13 … row sums 0, 1, 5, 10, 26, 91, 287, 820, …
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A063967 → D
1 · 3, 2 · 7, 10, 3 · 15, 32, 21, 4 … row sums 0, 1, 5, 20, 72, 244, 796, 2528, …
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A063967 → basis A013610
1 · 2, 3 · 6, 15, 9 · 16, 60, 72, 27 … row sums 1, 5, 30, 175, 1025, 6000, 35125, …
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A099093 → D+1
1 · 3, 3 · 3, 21, 9 · 0, 36, 99, 27 … row sums 1, 6, 33, 162, 756, 3402, 14931, 64314, …
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A010054 → reverse → reverse
1 · 3 · 6 · 10 … row sums 1, 3, 6, 10, 15, 21, 28, 36, …
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Triangle T(n, k) = coefficients of ( t(n, x) ) where t(n, x) = (1-x)^(n+1)*p(n, x)/x, p(n, x) = x*D( p(n-1, x) ), with p(1, x) = x/(1-x)^2, p(2, x) = x*(1+x)/(1-x)^3, and p(3, x) = x*(1+12*x+x^2)/(1-…
1, 12, 1 · 1, 27, 27, 1 · 1, 58, 162, 58, 1 … row sums 14, 56, 280, 1680, 11760, 94080, …
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A038284 → basis A008277
196, 204, 36 · 2744, 5256, 2160, 216 … row sums 436, 10376, 268864, 7547936, 228241216, …
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A188440 → θ+1
1 · 1 · 1, 4 · 1, 4 … row sums 1, 1, 5, 5, 21, 21, 81, 81, …
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A178822 → D
6 · 42, 42 · 168, 336, 168 · 504, 1512, 1512, 504 … row sums 0, 6, 84, 672, 4032, 20160, 88704, …
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A249251 → θ+1
1 · 1, 6 · 1, 12, 18 · 1, 18, 63, 48 … row sums 1, 7, 31, 130, 520, 2017, 7651, 28537, …
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A130534 → basis A013611
1 · 2, 4 · 6, 20, 16 · 24, 104, 144, 64 … row sums 1, 6, 42, 336, 3024, 30240, 332640, …
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A344565 → basis A013611
3 · 30, 60 · 180, 720, 720 · 840, 5040, 10080, 6720 … row sums 3, 90, 1620, 22680, 272160, 2939328, …
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A007318 → (θ+1)² → θ+1
1 · 1, 8 · 1, 16, 27 · 1, 24, 81, 64 … row sums 1, 9, 44, 170, 576, 1792, 5248, 14688, …
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A038335 → basis A013611
1 · 21, 36 · 441, 1512, 1296 … row sums 1, 57, 3249, 185193, 10556001, …
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A013609 → basis A013610
1 · 3, 6 · 9, 36, 36 · 27, 162, 324, 216 … row sums 1, 9, 81, 729, 6561, 59049, 531441, …
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A152828 → D
1 · 1 · 1 · 2, 2 … row sums 0, 0, 0, 1, 1, 1, 4, 4, …
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A038321 → basis A013609
324, 504, 196 · 5832, 13608, 10584, 2744 … row sums 1024, 32768, 1048576, 33554432, …
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A178821 → basis A013610
1 · 10, 15 · 60, 180, 135 · 280, 1260, 1890, 945 … row sums 1, 25, 375, 4375, 43750, 393750, …
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A152842 → reverse
1 · 3, 1 · 3, 4, 1 · 9, 15, 7, 1 … row sums 1, 4, 8, 32, 64, 256, 512, 2048, …