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A026575 T(2n,n-1), T given by A026568. 0
1, 2, 12, 38, 200, 701, 3682, 13294, 70665, 258430, 1388002, 5114572, 27682135, 102539204, 558172494, 2075658454, 11348521989, 42330184638 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..18.

CROSSREFS

Sequence in context: A305864 A035597 A000913 * A048349 A009632 A190022

Adjacent sequences:  A026572 A026573 A026574 * A026576 A026577 A026578

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 21 01:12 EST 2019. Contains 320364 sequences. (Running on oeis4.)