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A026591 T(2n,n-1), T given by A026584. 0
1, 2, 9, 38, 140, 701, 2534, 13294, 48369, 258430, 947694, 5114572, 18872399, 102539204, 380143356, 2075658454, 7723000261, 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: A195187 A041515 A010750 * A007224 A181339 A291265

Adjacent sequences:  A026588 A026589 A026590 * A026592 A026593 A026594

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified June 5 03:12 EDT 2020. Contains 334828 sequences. (Running on oeis4.)