A106211 Row sums of triangle A106210.

1, 2, 7, 38, 301, 3224, 44021, 735216, 14580195, 335762290, 8824804889, 261084641178, 8597298494025, 312159531050382, 12399137504630097, 535147013379083822, 24950976908580696095, 1250331101054276584968

Offset

0,2

Links

Table of n, a(n) for n=0..17.

Prog

(PARI) {a(n)=local(A=matrix(1, 1), B); A[1, 1]=1; for(m=2, n+2, 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^2)[i-1, 1], B[i, j]=(A^2)[i-1, j])); )); A=B); return(sum(k=0, n, if(k==0, A[n+1, k+1], A[n+1, k]/k^2)))}

Crossrefs

Cf. A106210.

Sequence in context: A233335 A000366 A341381 * A222034 A337685 A014058

Adjacent sequences: A106208 A106209 A106210 * A106212 A106213 A106214

Keyword

nonn

Author

Paul D. Hanna, May 01 2005

Status

approved