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A105617
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Column 2 of triangle A105615.
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2
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1, 6, 50, 522, 6498, 93666, 1532970, 28079082, 569212578, 12655466946, 306280630890, 8017054975242, 225716319717858, 6802519195684386, 218521006115328810, 7454198349649868202, 269114811307118424738
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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PROG
| (PARI) {a(n)=if(n<0, 0, (matrix(n+3, n+3, m, j, if(m>=j, if(m==j, 1, if(m==j+1, -2*j, polcoeff(1/sum(i=0, m-j, (2*i)!/i!/2^i*x^i)+O(x^m), m-j) ))))^-1)[n+3, 3])}
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CROSSREFS
| Cf. A105615.
Sequence in context: A039742 A125558 A005416 * A094072 A058784 A008380
Adjacent sequences: A105614 A105615 A105616 * A105618 A105619 A105620
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KEYWORD
| nonn
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AUTHOR
| Paul D. Hanna (pauldhanna(AT)juno.com), Apr 16 2005
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