A113093 Main diagonal of square table A113092; also, a(n) equals the n-th term in column 0 of the matrix n-th power of triangle A113095.

1, 1, 13, 693, 146821, 124626530, 426524622399, 5893207147435867, 328422072384464274577, 73719657441008064407836359, 66567306698774377126527799872190

Offset: 0

Author

Paul D. Hanna, Oct 14 2005

Keywords

• nonn

Crossrefs

Cf. A113092, A113095.

Programs

PARI

{a(n,q=4)=local(M=matrix(n+1,n+1));for(r=1,n+1, for(c=1,r, M[r,c]=if(r==c,1,if(c>1,(M^q)[r-1,c-1])+(M^q)[r-1,c]))); return((M^n)[n+1,1])}