A113087 Row sums of triangle A113084, which satisfies the recurrence: A113084(n,k) = [A113084^3](n-1,k-1) + [A113084^3](n-1,k).

1, 2, 8, 68, 1252, 51724, 5000468, 1176844012, 696653833108, 1063944196415276, 4273738134967763028, 45828521528368595280876, 1327368163105850592309345044, 104832927462400739554960944906668

Offset: 0

Author

Paul D. Hanna, Oct 14 2005

Keywords

• nonn

Crossrefs

Cf. A113084.

Programs

PARI

{a(n)=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^3)[r-1,c-1])+(M^3)[r-1,c]))); return(sum(k=1,n+1,M[n+1,k]))}