A290461 - OEIS

A290461

Binomial(n,4) - A290447(n).

0, 0, 0, 0, 0, 0, 0, 0, 2, 10, 30, 50, 88, 126, 176, 256, 374, 492, 651, 810, 1013, 1285, 1605, 1925, 2327, 2794, 3315, 3921, 4627, 5333, 6215, 7097, 8093, 9210, 10411, 11763, 13392, 15021, 16748, 18649, 20833, 23017, 25480, 27943, 30634, 33656, 36806, 39956, 43478, 47215, 51266, 55565, 60168

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OFFSET

1,9

COMMENTS

Binomial(n,4) is an upper bound on A290447. No formula or recurrence is known for the latter, but perhaps the differences will turn out to be simpler to analyze.

LINKS

N. J. A. Sloane, Table of n, a(n) for n = 1..500 [Based on David Applegate's b-file for A290447]

CROSSREFS

Cf. A000332, A290447.

Sequence in context: A063564 A076440 A047198 * A162524 A065137 A034262

Adjacent sequences: A290458 A290459 A290460 * A290462 A290463 A290464

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Aug 07 2017

STATUS

approved