A047129 T(2n,n), array T as in A047120.

1, 1, 6, 28, 166, 971, 5937, 36736, 230363, 1458037, 9292357, 59576614, 383721187, 2481397399, 16099317872, 104753149406, 683279530195, 4466548322041, 29253296829696, 191917744224242, 1260998821726319, 8296736705457073

Offset

0,3

Links

Table of n, a(n) for n=0..21.

Crossrefs

Sequence in context: A309490 A344755 A045722 * A173081 A278015 A338810

Adjacent sequences: A047126 A047127 A047128 * A047130 A047131 A047132

Keyword

nonn

Author

Definition revised by Clark Kimberling, Dec 08 2006

Status

approved