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A193848
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Triangular array: (1/2)*A193846.
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3
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1, 2, 4, 4, 14, 13, 8, 40, 68, 40, 16, 104, 256, 284, 121, 32, 256, 824, 1336, 1094, 364, 64, 608, 2416, 5144, 6196, 4010, 1093, 128, 1408, 6656, 17536, 27824, 26608, 14216, 3280, 256, 3200, 17536, 55040, 108256, 136688, 108256, 49208, 9841, 512
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text;
internal format)
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OFFSET
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0,2
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LINKS
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FORMULA
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G.f.: 1/(1 - 2*(1 + 2*y)*x + y*(2 + 3*y)*x^2). - Andrew Howroyd, Feb 18 2024
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EXAMPLE
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Triangle begins:
1;
2, 4;
4, 14, 13;
8, 40, 68, 40;
16, 104, 256, 284, 121;
32, 256, 824, 1336, 1094, 364;
64, 608, 2416, 5144, 6196, 4010, 1093;
128, 1408, 6656, 17536, 27824, 26608, 14216, 3280;
...
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MATHEMATICA
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PROG
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(PARI) T(n)={[Vecrev(p) | p<-Vec(1/(1 - 2*(1 + 2*y)*x + y*(2 + 3*y)*x^2) + O(x*x^n))]}
{ my(A=T(10)); for(i=1, #A, print(A[i])) } \\ Andrew Howroyd, Feb 18 2024
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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