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Search: id:A104985
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| 1, 0, -2, -6, -20, -92, -554, -4002, -33096, -306440, -3135766, -35134670, -427878628, -5628940084, -79572364498, -1203168642362, -19379896959776, -331331041788640, -5993029816637262, -114348894263852326, -2295445815821635932, -48362099044178487564
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OFFSET
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0,3
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COMMENT
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A104984 equals the matrix inverse of A104980.
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PROGRAM
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(PARI) {a(n)=sum(k=0, n, if(k==n, 1, if(k==n-1, -n, -polcoeff((1-1/sum(i=0, n-k, i!*x^i))/x+O(x^(n-k)), n-k-1) )))}
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CROSSREFS
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Cf. A104984, A104980.
Sequence in context: A005965 A000421 A009244 this_sequence A079575 A078564 A079576
Adjacent sequences: A104982 A104983 A104984 this_sequence A104986 A104987 A104988
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KEYWORD
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sign
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AUTHOR
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Paul D. Hanna (pauldhanna(AT)juno.com), Apr 10 2005
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