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A139469 a(n)=sum{k=0..n, C(n,3k+2)^2}. 2
0, 0, 1, 9, 36, 101, 261, 882, 3921, 17253, 67554, 243695, 876789, 3324906, 13166791, 52301709, 203824548, 782913717, 3010327497, 11695756698, 45823049817, 179787741723, 703527078258, 2747647985241, 10739885115573, 42082084255050, 165225573240651 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..26.

CROSSREFS

Cf. A119363, A139468.

Sequence in context: A000537 A114286 A098928 * A103158 A298442 A212104

Adjacent sequences:  A139466 A139467 A139468 * A139470 A139471 A139472

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 12 2008

STATUS

approved

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Last modified November 19 02:01 EST 2018. Contains 317332 sequences. (Running on oeis4.)