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A026660 T(2n,n), T given by A026659. 0
1, 2, 8, 26, 118, 410, 1946, 6958, 33764, 122638, 602972, 2211946, 10970256, 40518606, 202195920, 750531666, 3762558534, 14019202506, 70531575722, 263582194126, 1329868264538, 4981772359258, 25193088990806, 94561764282118 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..23.

CROSSREFS

Sequence in context: A150686 A150687 A150688 * A150689 A150690 A150691

Adjacent sequences:  A026657 A026658 A026659 * A026661 A026662 A026663

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified October 31 08:46 EDT 2020. Contains 338101 sequences. (Running on oeis4.)