A028227 Expansion of 1/((1-7x)(1-9x)(1-11x)(1-12x)).

1, 39, 958, 18966, 330883, 5313693, 80518096, 1169149692, 16435587685, 225292911987, 3026941267714, 40015278899778, 522017655765607, 6735488552529321, 86110477932406612, 1092366397140622824

Offset

0,2

Links

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

Index entries for linear recurrences with constant coefficients, signature (39, -563, 3561, -8316).

Formula

a(n)=(8*12^(n+3)-15*11^(n+3)+10*9^(n+3)-3*7^(n+3))/120. [Yahia Kahloune, Jun 05 2013]

Crossrefs

Sequence in context: A069418 A194477 A016091 * A028219 A209076 A251327

Adjacent sequences: A028224 A028225 A028226 * A028228 A028229 A028230

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved