%I #5 Jun 13 2017 23:05:06
%S 1,15,210,3285,59395,1241270,29720808,806720492,24568601477,
%T 831697990069,31036137984664,1267376997249262,56270606942915489,
%U 2701018385881136958,139463341982980040911,7711492696761363573725
%N Column 2 of triangle A113360, also equals column 1 of A113340^5.
%C A113360 equals the matrix cube of triangle A113340, where column 2 of A113340^3 = column 1 of A113340^5.
%o (PARI) a(n)=local(A,B);A=matrix(1,1);A[1,1]=1;for(m=2,n+3,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^3)[n+3,3]
%Y Cf. A113340, A113350, A113360 (A113340^3), A113341 (column 0), A113361 (column 1), A113363 (column 3), A113364 (column 4).
%K nonn
%O 0,2
%A _Paul D. Hanna_, Nov 08 2005