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A123936 A079137(n)/2. 1
0, 0, 4, 0, 41, 372, 3189, 15544, 94844, 606556, 3341926, 18243164, 100641235, 541792652, 2853058729, 14909615644, 77215251362, 395393899688, 2007472847598, 10120652405244, 50668068245114 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..21.

CROSSREFS

Sequence in context: A271300 A271120 A174083 * A271834 A138546 A019217

Adjacent sequences:  A123933 A123934 A123935 * A123937 A123938 A123939

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 30 2006

STATUS

approved

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Last modified December 11 22:04 EST 2018. Contains 318052 sequences. (Running on oeis4.)