A021834 Expansion of 1/((1-x)*(1-4*x)*(1-6*x)*(1-11*x)).

1, 22, 329, 4226, 50469, 580422, 6541681, 72922570, 808020125, 8923802030, 98376704361, 1083438632562, 11925616635349, 131228622530326, 1443796242996449, 15883448475593882, 174728077773953421

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Index entries for linear recurrences with constant coefficients, signature (22,-155,398,-264).

Formula

a(n) = (3*11^(n+3) - 21*6^(n+3) + 25*4^(n+3) - 7)/1050. [Yahia Kahloune, Jul 05 2013]

Mathematica

CoefficientList[Series[1 / ((1 - x) (1 - 4 x) (1 - 6 x) (1 - 11 x)), {x, 0, 20}], x] (* Vincenzo Librandi, Jul 11 2013 *)

Crossrefs

Sequence in context: A230965 A019958 A021644 * A019671 A021614 A258006

Adjacent sequences: A021831 A021832 A021833 * A021835 A021836 A021837

Keyword

nonn,easy

Author

N. J. A. Sloane.

Status

approved