A025987 Expansion of 1/((1-2x)(1-5x)(1-6x)(1-8x)).

1, 21, 285, 3185, 31941, 299481, 2685565, 23352945, 198684981, 1663903241, 13774041645, 113050606305, 921961387621, 7483064823801, 60518933442525, 488128819261265, 3929148977523861, 31579173926461161

Offset

0,2

Links

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

Index entries for linear recurrences with constant coefficients, signature (21, -156, 476, -480).

Formula

a(n) = (2*8^(n+3)-9*6^(n+3)+8*5^(n+3)-2^(n+3))/72. [Yahia Kahloune, May 25 2013]

Crossrefs

Sequence in context: A323063 A028033 A176711 * A125456 A296333 A028028

Adjacent sequences: A025984 A025985 A025986 * A025988 A025989 A025990

Keyword

nonn,easy

Author

N. J. A. Sloane.

Status

approved