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A105617
Column 2 of triangle
A105615
.
2
1, 6, 50, 522, 6498, 93666, 1532970, 28079082, 569212578, 12655466946, 306280630890, 8017054975242, 225716319717858, 6802519195684386, 218521006115328810, 7454198349649868202, 269114811307118424738
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..16.
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])}
CROSSREFS
Cf.
A105615
.
Sequence in context:
A355421
A005416
A300989
*
A297926
A094072
A361193
Adjacent sequences:
A105614
A105615
A105616
*
A105618
A105619
A105620
KEYWORD
nonn
AUTHOR
Paul D. Hanna
, Apr 16 2005
STATUS
approved
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Last modified August 14 19:51 EDT 2024. Contains 375167 sequences. (Running on oeis4.)