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

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Last modified September 21 04:53 EDT 2020. Contains 337266 sequences. (Running on oeis4.)