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A026578 T(2n-1,n-2), T given by A026568. 0
1, 3, 13, 60, 225, 1148, 4235, 22296, 82425, 440308, 1634435, 8809736, 32819839, 178029138, 665162897, 3625521728, 13577768505 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..18.

CROSSREFS

Sequence in context: A317776 A145942 A074437 * A199641 A292796 A020007

Adjacent sequences:  A026575 A026576 A026577 * A026579 A026580 A026581

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified May 25 19:13 EDT 2019. Contains 323576 sequences. (Running on oeis4.)