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A104031
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Column 1 of triangle A104030, which is the matrix inverse of the triangle of pair-wise sums of trinomial coefficients.
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1
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1, -5, 32, -299, 4015, -74080, 1801537, -55855829, 2150565968, -100668835739, 5630336915071, -370807060847872, 28403381397111649, -2503741873703550533, 251652633457563092096, -28608467296650576313259, 3652291148549164761101551, -520296573821474451201241696
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Column 0 of triangle A104030 forms signed Hammersley's polynomial p_n(1) (A006846), offset 1.
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PROG
| (PARI) {a(n)=if(n<0, 0, ((matrix(n+2, n+2, m, j, if(m>=j, polcoeff((1+x+x^2)^(m-1)+O(x^(2*j)), 2*j-2)+ polcoeff((1+x+x^2)^(m-1)+O(x^(2*j)), 2*j-1))))^-1)[n+2, 2])}
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CROSSREFS
| Cf. A104030.
Sequence in context: A166993 A001923 A023880 * A023882 A109780 A093448
Adjacent sequences: A104028 A104029 A104030 * A104032 A104033 A104034
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KEYWORD
| sign
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AUTHOR
| Paul D. Hanna (pauldhanna(AT)juno.com), Feb 26 2005
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