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A026694 T(2n,n-1), T given by A026692. 0
1, 4, 24, 89, 507, 1913, 10832, 41485, 234997, 909772, 5161736, 20142456, 114475100, 449409816, 2558062376, 10089877429, 57509594605, 227694240418, 1299311929720, 5160174433873, 29475731911575, 117362831079013, 670984236347368 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..23.

CROSSREFS

Sequence in context: A061612 A097875 A212681 * A026967 A026977 A026952

Adjacent sequences:  A026691 A026692 A026693 * A026695 A026696 A026697

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified October 18 18:47 EDT 2021. Contains 348068 sequences. (Running on oeis4.)