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A027309 a(n) = Sum{(T(n,k)*T(n,k+1)}, 0<=k<=2n-1, T given by A026323. 0
2, 16, 123, 956, 7519, 59742, 478869, 3868104, 31458348, 257396972, 2117494621, 17504651148, 145341743066 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..13.

CROSSREFS

Sequence in context: A209361 A229808 A301947 * A241466 A069868 A208073

Adjacent sequences:  A027306 A027307 A027308 * A027310 A027311 A027312

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 20 01:58 EDT 2019. Contains 327207 sequences. (Running on oeis4.)