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A027985 a(n) = Sum{T(n,k)*T(n,k+1)}, 0<=k<=2n-1, T given by A027960. 0
6, 35, 144, 564, 2186, 8468, 32856, 127729, 497454, 1940525, 7580656, 29651385, 116111194, 455138499, 1785707924, 7011933544, 27554583254, 108355491404, 426368213364, 1678704356644, 6613026412314, 26064305550054, 102777232982624 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..23.

CROSSREFS

Sequence in context: A089581 A132657 A161784 * A078799 A203288 A026957

Adjacent sequences: A027982 A027983 A027984 * A027986 A027987 A027988

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified March 20 05:51 EDT 2023. Contains 361359 sequences. (Running on oeis4.)