0,3
Table of n, a(n) for n=0..18.
(PARI) {A185620(n, k)=local(A=Mat(1), B); for(m=1, n, B=A^3-A^2+A^0;
A=matrix(m+1, m+1); for(i=1, m+1, for(j=1, i, if(i<2|j==i, A[i, j]=1,
if(j==1, A[i, j]=1, A[i, j]=B[i-1, j-1]))))); return(A[n+1, k+1])}
/* Column 2: */ {a(n)=A185620(n+2, 2)}
Cf. A185620, A185621, A185623.
Sequence in context: A109963 A201870 A091101 * A225309 A231091 A205774
Adjacent sequences: A185619 A185620 A185621 * A185623 A185624 A185625
nonn
Paul D. Hanna, Feb 01 2011
approved
