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A026896 T(2n,n+3), T given by A026780. 0
1, 9, 57, 316, 1647, 8330, 41558, 206418, 1026392, 5126109, 25763881, 130446758, 665644541, 3423360416, 17740450004, 92599616864, 486607242642, 2573051443194, 13683364565774, 73146530405912, 392867752273562, 2119154966713452 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

LINKS

Table of n, a(n) for n=3..24.

CROSSREFS

Sequence in context: A045720 A014916 A045635 * A080961 A163919 A262490

Adjacent sequences:  A026893 A026894 A026895 * A026897 A026898 A026899

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 18 00:40 EDT 2021. Contains 347493 sequences. (Running on oeis4.)