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A026989 a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026681. 0
1, 14, 115, 660, 3805, 20520, 109779, 551774, 2921313, 14482320, 71576096, 349292330, 1804636693, 8745745676, 42107640345, 203559063050, 1040682784201, 5002217935308, 23823427871991, 114772726273528, 583453635620973, 2795288971320092, 13246283464422706, 63736681240596050 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

LINKS

Table of n, a(n) for n=3..26.

CROSSREFS

Sequence in context: A027204 A200037 A026959 * A204240 A178258 A121783

Adjacent sequences:  A026986 A026987 A026988 * A026990 A026991 A026992

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Oct 21 2019

STATUS

approved

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Last modified January 25 08:01 EST 2021. Contains 340416 sequences. (Running on oeis4.)