A028226 Expansion of 1/((1-7x)(1-9x)(1-10x)(1-12x)).

1, 38, 909, 17518, 297437, 4648350, 68550973, 968960366, 13264544733, 177146894782, 2320188183677, 29920806791694, 381057655784989, 4803870896957534, 60058812824159421, 745739268125744302

Offset

0,2

Links

Table of n, a(n) for n=0..15.

Index entries for linear recurrences with constant coefficients, signature (38, -535, 3306, -7560).

Formula

a(n)=(12^(n+3)-5*10^(n+3)+5*9^(n+3)-7^(n+3))/30. [Yahia Kahloune, Jun 05 2013]

Crossrefs

Sequence in context: A270500 A268788 A016075 * A028224 A028218 A028199

Adjacent sequences: A028223 A028224 A028225 * A028227 A028228 A028229

Keyword

nonn

Author

N. J. A. Sloane

Status

approved