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A026974 a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026648. 0
1, 12, 77, 450, 2154, 11592, 51060, 261720, 1106790, 5562216, 23051943, 114491286, 468950860, 2313509520, 9409147640, 46221336720, 187136146566, 916762621320, 3700703183930, 18096198791748, 72903667955404, 356052268340208, 1432473805470840, 6990085402419600, 28096469154731484 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

LINKS

Table of n, a(n) for n=3..27.

CROSSREFS

Sequence in context: A267174 A266766 A026964 * A210695 A109711 A244390

Adjacent sequences:  A026971 A026972 A026973 * A026975 A026976 A026977

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Oct 20 2019

STATUS

approved

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Last modified January 16 16:32 EST 2022. Contains 350376 sequences. (Running on oeis4.)