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Search: id:A104981
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| 0, 1, 2, 7, 33, 191, 1297, 10063, 87669, 847015, 8989301, 103996703, 1303132269, 17589153719, 254509227541, 3931158238735, 64573130459613, 1124144767682215, 20677664894412965, 400760695386194687, 8163539437728923181
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OFFSET
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0,3
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PROGRAM
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(PARI) {a(n)=if(n<0, 0, (matrix(n+2, n+2, m, j, if(m==j, 1, if(m==j+1, -m+1, -polcoeff((1-1/sum(i=0, m, i!*x^i))/x+O(x^m), m-j-1))))^-1)[n+1, 2])}
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CROSSREFS
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Cf. A104980, A104986.
Sequence in context: A055724 A054727 A086618 this_sequence A058797 A121967 A006595
Adjacent sequences: A104978 A104979 A104980 this_sequence A104982 A104983 A104984
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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), Apr 10 2005
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