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A071909 A002487(n)*A002487(n+1)*A002487(n+2)/2. 0
0, 1, 1, 3, 3, 9, 3, 6, 6, 30, 15, 25, 15, 30, 6, 10, 10, 70, 42, 84, 60, 140, 35, 49, 35, 140, 60, 84, 42, 70, 10, 15, 15, 135, 90, 198, 154, 385, 105, 165, 132, 572, 260, 390, 210, 378, 63, 81, 63, 378, 210, 390, 260, 572, 132, 165, 105, 385, 154, 198, 90, 135, 15, 21, 21, 231 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..65.

CROSSREFS

Sequence in context: A127795 A074724 A109932 * A134662 A145444 A165824

Adjacent sequences:  A071906 A071907 A071908 * A071910 A071911 A071912

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 13 2002

STATUS

approved

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Last modified October 19 16:17 EDT 2019. Contains 328223 sequences. (Running on oeis4.)