A028180 Expansion of 1/((1-5x)(1-7x)(1-8x)(1-9x)).

1, 29, 530, 7810, 101451, 1213359, 13695340, 148146020, 1551618101, 15847349089, 158652680550, 1562885008230, 15193886293951, 146104406183219, 1392173613916160, 13163974362722440, 123666997751585001

Offset

0,2

Links

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

Index entries for linear recurrences with constant coefficients, signature (29, -311, 1459, -2520).

Formula

a(n)=(3*9^(n+3)-8^(n+4)+6*7^(n+3)-5^(n+3))/24. [Yahia Kahloune, May 31 2013]

Crossrefs

Sequence in context: A228217 A305315 A225899 * A028171 A028146 A121046

Adjacent sequences: A028177 A028178 A028179 * A028181 A028182 A028183

Keyword

nonn,easy

Author

N. J. A. Sloane.

Status

approved