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A144637
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Column 2 of triangle in A144633.
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1
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0, 0, 1, -3, 11, -45, 175, -315, -6265, 139755, -2127125, 28153125, -327452125, 2921393475, -2998820825, -788463550875, 28464750689375, -739460838241125, 16173782241491875, -294957734383186875, 3672958879661946875, 19544468129733421875, -3601613031568517590625
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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LINKS
| Alois P. Heinz, Table of n, a(n) for n = 0..100
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FORMULA
| E.g.f.: B(x)^2/2 where B(x) is e.g.f. for A144636. [From Vladeta Jovovic (vladeta(AT)eunet.yu), Jan 24 2009]
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MAPLE
| A:= proc(n, k) option remember; if n=k then 1 elif k<n or n<1 then 0 else A(n-1, k-1) +(k-1) *A(n-1, k-2) +(k-1) *(k-2) *A(n-1, k-3)/2 fi end: M:= proc(n) option remember; Matrix(n+1, (i, j)-> A(i-1, j-1))^(-1) end: a:= n-> M (n+2)[3, n+1]: seq (a(n), n=0..25); # Alois P. Heinz, Oct 25 2009
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CROSSREFS
| Sequence in context: A030844 A030959 A073590 * A151109 A151110 A151111
Adjacent sequences: A144634 A144635 A144636 * A144638 A144639 A144640
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KEYWORD
| sign
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jan 23 2009
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EXTENSIONS
| More terms from Alois P. Heinz (heinz(AT)hs-heilbronn.de), Oct 25 2009
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