A101484 Row sums of triangular matrix A101479, in which row n equals row (n-1) of A101479^(n-1) followed by '1'.

1, 2, 3, 7, 33, 285, 3648, 61306, 1270440, 31244205, 888288960, 28640745684, 1032065614715, 41087944243649, 1790413981105727, 84737880414848784, 4327877295100145382, 237218770042549151701, 13887772416031152573506

Offset

0,2

Links

Table of n, a(n) for n=0..18.

Prog

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

Crossrefs

Sequence in context: A161471 A057677 A032148 * A004026 A135907 A027624

Adjacent sequences: A101481 A101482 A101483 * A101485 A101486 A101487

Keyword

nonn

Author

Paul D. Hanna, Jan 21 2005

Status

approved