A027104 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

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

(list; graph; refs; listen; history; text; internal format)

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