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A026973 a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026648. 0
1, 8, 52, 224, 1131, 4620, 23456, 92752, 460170, 1805760, 8946216, 34942176, 172593267, 673129380, 3323413216, 12954246368, 63944790462, 249263001360, 1230668687000, 4798770328960, 23700302314238, 92457112946968, 456814709763456, 1782991313610720, 8813232700137268 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..26.

CROSSREFS

Sequence in context: A024179 A302816 A026963 * A244718 A303509 A107584

Adjacent sequences:  A026970 A026971 A026972 * A026974 A026975 A026976

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Oct 20 2019

STATUS

approved

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Last modified January 28 13:34 EST 2022. Contains 350656 sequences. (Running on oeis4.)