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A026771 T(2n,n-1), T given by A026769. 1
1, 6, 31, 156, 784, 3962, 20173, 103522, 535294, 2787700, 14613710, 77072816, 408737760, 2178631156, 11666175215, 62734622764, 338660977020, 1834690352066, 9971834477972, 54361287536706, 297170702049966, 1628670524735842 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..22.

CROSSREFS

Sequence in context: A026705 A243874 A003463 * A289788 A065096 A077352

Adjacent sequences:  A026768 A026769 A026770 * A026772 A026773 A026774

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 22 01:04 EST 2019. Contains 320381 sequences. (Running on oeis4.)