|
%I #5 Jun 13 2017 23:21:18
%S 1,12,138,1830,28805,535004,11568197,287143993,8077888153,
%T 254672147047,8910929460415,343135184110984,14435616939387951,
%U 659276261774240232,32504007393860850275,1721495715845423489806,97516667477625085469176
%N Column 1 of triangle A113365, also equals column 1 of A113340^4.
%C A113365 equals the matrix cube of A113350, where column 1 of A113350^3 = column 1 of A113340^4.
%o (PARI) a(n)=local(A,B);A=matrix(1,1);A[1,1]=1;for(m=2,n+2,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); (matrix(#A,#A,r,c,if(r>=c,(A^(2*c))[r-c+1,1]))^3)[n+2,2]
%Y Cf. A113340, A113350, A113365 (=A113350^3), A113346 (column 0), A113367 (column 2); A113355 (=A113350^2), A113360 (=A113340^3).
%K nonn
%O 0,2
%A _Paul D. Hanna_, Nov 09 2005
|
