Search: id:A144638
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%I A144638
%S A144638 0,0,0,1,6,35,210,1225,5670,5005,750750,16391375,278528250,
%T A144638 4130451325,51941839950,429736682375,3328691115750,297526876521875,
%U A144638 10250866397021250,276000929009430625,6284336658393543750
%V A144638 0,0,0,1,-6,35,-210,1225,-5670,-5005,750750,-16391375,278528250,
%W A144638 -4130451325,51941839950,-429736682375,-3328691115750,297526876521875,
%X A144638 -10250866397021250,276000929009430625,-6284336658393543750
%N A144638 Column 3 of triangle in A144633.
%F A144638 E.g.f.: B(x)^3/6 where B(x) is e.g.f. for A144636. [From Vladeta Jovovic 
               (vladeta(AT)eunet.yu), Jan 24 2009]
%p A144638 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+3)[4, n+1]: seq (a(n), n=0..25); [From 
               Alois P. Heinz (heinz(AT)hs-heilbronn.de), Oct 25 2009]
%Y A144638 Sequence in context: A161727 A121838 A001109 this_sequence A117671 A000399 
               A081051
%Y A144638 Adjacent sequences: A144635 A144636 A144637 this_sequence A144639 A144640 
               A144641
%K A144638 sign
%O A144638 0,5
%A A144638 N. J. A. Sloane (njas(AT)research.att.com), Jan 23 2009
%E A144638 More terms from Alois P. Heinz (heinz(AT)hs-heilbronn.de), Oct 25 2009

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