The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #5 Jun 13 2017 22:50:32
%S 1,7,70,889,13853,258146,5633264,141487178,4031806898,128792484219,
%T 4565493788191,178051324792642,7583098790779316,350435514388561567,
%U 17474323210108996497,935597107908721785211,53553176933223851350863
%N Column 3 of triangle A113340, also equals column 0 of A113340^7.
%o (PARI) a(n)=local(A,B);A=matrix(1,1);A[1,1]=1;for(m=2,n+4,B=matrix(m,m); for(i=1,m, for(j=1,i,if(i<3 || j==i || j>m-1,B[i,j]=1,if(j==1, B[i,1]=1,B[i,j]=(A^(2*j-1))[i-j+1,1]));));A=B);A[n+4,4]
%Y Cf. A113341 (column 1), A113342 (column 2), A113344 (column 4), A113340.
%K nonn
%O 0,2
%A _Paul D. Hanna_, Nov 08 2005