

A115046


G.f.: (1+x^2)^2*(x^46*x^3+1)/(x^21)^4.


1



1, 0, 6, 6, 20, 36, 50, 114, 104, 264, 190, 510, 316, 876, 490, 1386, 720, 2064, 1014, 2934, 1380, 4020, 1826, 5346, 2360, 6936, 2990, 8814, 3724, 11004, 4570, 13530, 5536, 16416, 6630, 19686, 7860, 23364, 9234, 27474, 10760, 32040, 12446, 37086, 14300, 42636, 16330
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OFFSET

0,3


COMMENTS

This sequence arose from an arithmetic error when computing A136264.


LINKS

Table of n, a(n) for n=0..46.
Index entries for linear recurrences with constant coefficients, signature (0,4,0,6,0,4,0,1).


FORMULA

a(n)= n/12+3/4n^3/6+3n^2/4+(1)^n*(3n^2/4+29n/123/4+n^3/3), n>0. [From R. J. Mathar, Mar 15 2009]


CROSSREFS

Sequence in context: A255468 A246037 A045896 * A004983 A034695 A198340
Adjacent sequences: A115043 A115044 A115045 * A115047 A115048 A115049


KEYWORD

sign,easy


AUTHOR

Roger L. Bagula, Feb 28 2006


EXTENSIONS

Edited by N. J. A. Sloane, Dec 21 2006 and Apr 19 2008


STATUS

approved



