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A143633
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E.g.f. satisfies: A(x) = exp(x*A(((x+1)^2-1)/2)).
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2
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1, 1, 3, 19, 185, 2541, 45787, 1037359, 28649553, 942585625, 36294146171, 1612599520599, 81729515092777, 4679679856932133, 300257015404355115, 21436580394615666991, 1692530428442960006753, 146987828523665177048241
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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LINKS
| Alois P. Heinz, Table of n, a(n) for n = 0..100
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MAPLE
| A:= proc(n, k::nonnegint) option remember; if n<=0 or k=0 then 1 else A(n-1, k)(((x+1)^k-1)/k) fi; unapply (convert (series (exp (x*%), x, n+1), polynom), x) end: a:= n-> coeff (A(n, 2)(x), x, n)*n!: seq (a(n), n=0..21);
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CROSSREFS
| Cf. 2nd column of A143632.
Sequence in context: A203133 A006531 A202617 * A052888 A141623 A090354
Adjacent sequences: A143630 A143631 A143632 * A143634 A143635 A143636
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KEYWORD
| nonn
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AUTHOR
| Alois P. Heinz (heinz(AT)hs-heilbronn.de), Aug 27 2008
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