A102099 - OEIS

%I #4 Mar 30 2012 18:36:44

%S 0,2,8,152,6200,442552,49399320,8003532512,1784040237288,

%T 525504809786112,198213959637435608,93352856625931514024,

%U 53776417402985961020144,37244016639064540041311632

%N Column 1 of triangular matrix A102098, which shifts upward to exclude the main diagonal under matrix cube.

%C Column 0 of A102098 is A082162.

%o (PARI) {a(n)=local(A=matrix(2,2),B);A[1,1]=1; for(m=2,n+1,B=matrix(m,m);for(i=1,m, for(j=1,i, if(j==i,B[i,j]=j,if(j==1,B[i,j]=(A^3)[i-1,1], B[i,j]=(A^3)[i-1,j]));));A=B); return(A[n+1,2])}

%Y Cf. A102098, A082162, A102100.

%K nonn

%O 0,2

%A _Paul D. Hanna_, Dec 29 2004