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A027331 a(n) = Sum_{k=0..m} T(n,k) * T(n,k+2), where m=2 for n=2 and m=n+1 for n >= 3; and T is given by A026148. 0
5, 36, 293, 2374, 19398, 159072, 1310669, 10844525, 90088935, 751173656, 6284938344, 52752138077, 444072874534, 3748425872686, 31720368301774, 269056938823323, 2287158222456938, 19481849054942368, 166260043774604820, 1421400361753347588, 12172156656845655429 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..22.

CROSSREFS

Sequence in context: A188899 A052203 A332624 * A255489 A091161 A135149

Adjacent sequences:  A027328 A027329 A027330 * A027332 A027333 A027334

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Oct 27 2019

STATUS

approved

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Last modified January 28 21:53 EST 2022. Contains 350669 sequences. (Running on oeis4.)