A028064 Expansion of 1/((1-3x)(1-5x)(1-8x)(1-9x)).

1, 25, 402, 5306, 62699, 691299, 7275724, 74105812, 736913397, 7196762573, 69311524646, 660250818318, 6234443691295, 58450533199447, 544794370231968, 5053142176005224, 46678603740543593, 429711934071787521

Offset

0,2

Links

Table of n, a(n) for n=0..17.

Index entries for linear recurrences with constant coefficients, signature (25,-223,831,-1080).

Formula

a(n)=(5*9^(n+3)-8^(n+4)+5^(n+4)-2*3^(n+3))/120. [Yahia Kahloune, Jun 08 2013]

Mathematica

CoefficientList[Series[1/((1-3x)(1-5x)(1-8x)(1-9x)), {x, 0, 30}], x] (* Harvey P. Dale, Apr 16 2019 *)

Crossrefs

Sequence in context: A042204 A028112 A238511 * A028061 A026561 A048908

Adjacent sequences: A028061 A028062 A028063 * A028065 A028066 A028067

Keyword

nonn,easy

Author

N. J. A. Sloane.

Status

approved