A024442 Expansion of 1/((1-x)(1-7x)(1-9x)(1-11x)).

1, 28, 518, 7988, 111279, 1454376, 18208156, 221140696, 2626932077, 30692791844, 354119115714, 4046102802924, 45880411771195, 517157095113232, 5801772397167992, 64842434348911472, 722511991410929433

Offset

0,2

Links

Table of n, a(n) for n=0..16.

Index entries for linear recurrences with constant coefficients, signature (28, -266, 932, -693).

Formula

a(n)=(6*11^(n+3) - 15*9^(n+3) + 10*7^(n+3) - 1)/480. [Yahia Kahloune, Jun 27 2013]

Mathematica

CoefficientList[Series[1/((1-x)(1-7x)(1-9x)(1-11x)), {x, 0, 30}], x] (* or *) LinearRecurrence[{28, -266, 932, -693}, {1, 28, 518, 7988}, 30] (* Harvey P. Dale, Jan 18 2015 *)

Crossrefs

Sequence in context: A026149 A028049 A283244 * A026108 A024434 A024440

Adjacent sequences: A024439 A024440 A024441 * A024443 A024444 A024445

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved