Search: id:A126466
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%I A126466
%S A126466 1,1,3,33,855,40475,3039204,331630320,49563943161,9722245517970,
%T A126466 2423526680920125,748560249534719259,280702726068079355157,
%U A126466 125661789748507921799800,66215986172320048509110050
%N A126466 Column 0 of triangle A126465.
%o A126466 (PARI) {a(n)=local(M=matrix(n+1,n+1,r,c,if(r>=c,binomial((r-1)*r*(r+1)/
               3!-(c-1)*c*(c+1)/3!,r-c))), N=matrix(n+1,n+1,r,c,if(r>=c,binomial((r-1)*r*(r+1)/
               3!-(c-1)*c*(c+1)/3!+1,r-c)))); (N*M^-1)[n+1,1]}
%Y A126466 Cf. A126465, A126467, A126468; A126469 (row sums).
%Y A126466 Sequence in context: A003715 A009690 A124432 this_sequence A002112 A055549 
               A086894
%Y A126466 Adjacent sequences: A126463 A126464 A126465 this_sequence A126467 A126468 
               A126469
%K A126466 nonn
%O A126466 0,3
%A A126466 Paul D. Hanna (pauldhanna(AT)juno.com), Dec 27 2006

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