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A125798 A diagonal of table A125790: a(n) = A125790(n+1,n). 8

%I #5 Jun 14 2017 00:16:22

%S 1,4,35,656,25509,2026564,326603719,106355219008,69808185542089,

%T 92203545302072964,244779396712068825067,1305009502037405316440848,

%U 13963029918525356899170492525,299675759834305402824238609624548

%N A diagonal of table A125790: a(n) = A125790(n+1,n).

%o (PARI) a(n)=local(q=2,A=Mat(1), B); for(m=1, n+2, B=matrix(m, m); for(i=1, m, for(j=1, i, if(j==i || j==1, B[i, j]=1, B[i, j]=(A^q)[i-1, j-1]); )); A=B); return(sum(c=0,n+1,(A^n)[n+2,c+1]))

%Y Cf. A125790, A078121; columns: A002577, A125792, A125793, A125794, A125795, A125796; A125797 (diagonal).

%K nonn

%O 0,2

%A _Paul D. Hanna_, Dec 10 2006

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Last modified March 29 09:59 EDT 2024. Contains 371268 sequences. (Running on oeis4.)