A028021 Expansion of 1/((1-2x)(1-9x)(1-10x)(1-11x)).

1, 32, 665, 11380, 174261, 2483592, 33669985, 440024060, 5592152621, 69530670352, 849490297305, 10231269580740, 121775852180581, 1435121355116312, 16771617736444625, 194605340572369420

Offset

0,2

Links

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

Index entries for linear recurrences with constant coefficients, signature (32,-359,1588,-1980).

Formula

a(n)=(28*11^(n+3)-63*10^(n+3)+36*9^(n+3)-2^(n+3))/504. [Yahia Kahloune, May 30 2013]

Mathematica

CoefficientList[Series[1/((1-2x)(1-9x)(1-10x)(1-11x)), {x, 0, 30}], x] (* or *) LinearRecurrence[{32, -359, 1588, -1980}, {1, 32, 665, 11380}, 30] (* Harvey P. Dale, May 04 2018 *)

Crossrefs

Sequence in context: A028143 A028101 A028097 * A028129 A028088 A028019

Adjacent sequences: A028018 A028019 A028020 * A028022 A028023 A028024

Keyword

nonn,easy

Author

N. J. A. Sloane.

Status

approved