A027104 a(n) = Sum_{k=0..n} T(n,k) * T(n,2n-k), with T given by A027082.

1, 2, 6, 25, 93, 357, 1373, 5188, 19456, 72373, 267137, 979762, 3573058, 12965292, 46839228, 168552205, 604420933, 2160638253, 7701879217, 27384190634, 97138835970, 343846037094, 1214761031998, 4283924048755

Offset

0,2

Links

Table of n, a(n) for n=0..23.

Crossrefs

Sequence in context: A220191 A030228 A066317 * A019048 A289604 A028302

Adjacent sequences: A027101 A027102 A027103 * A027105 A027106 A027107

Keyword

nonn

Author

Clark Kimberling

Status

approved