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Search: id:A126468
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| 1, 1, 10, 255, 11935, 879571, 93365328, 13464554610, 2531141851260, 601339958510170, 176255315943299736, 62514948119465302825, 26407795709641456484010, 13109371824722841349352160
(list; graph; listen)
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OFFSET
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0,3
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PROGRAM
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(PARI) {a(n)=local(M=matrix(n+3, n+3, r, c, if(r>=c, binomial((r-1)*r*(r+1)/3!-(c-1)*c*(c+1)/3!, r-c))), N=matrix(n+3, n+3, r, c, if(r>=c, binomial((r-1)*r*(r+1)/3!-(c-1)*c*(c+1)/3!+1, r-c)))); (N*M^-1)[n+3, 3]}
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CROSSREFS
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Cf. A126465, A126466, A126467; A126469 (row sums).
Sequence in context: A095983 A059166 A100743 this_sequence A024293 A120268 A001824
Adjacent sequences: A126465 A126466 A126467 this_sequence A126469 A126470 A126471
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KEYWORD
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nonn
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AUTHOR
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Paul D. Hanna (pauldhanna(AT)juno.com), Dec 27 2006
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