A028009 Expansion of 1/((1-2x)(1-7x)(1-9x)(1-10x)).

1, 28, 509, 7628, 102477, 1284060, 15338893, 177026476, 1991073293, 21954504572, 238334455437, 2555217498444, 27118409281549, 285415846100764, 2983193752870541, 30999901741572332, 320557221434296845, 3300921733229659836, 33869642781313790605

Offset

0,2

Links

Table of n, a(n) for n=0..18.

Index entries for linear recurrences with constant coefficients, signature (28, -275, 1076, -1260).

Formula

a(n) = (35*10^(n+3)-60*9^(n+3)+4*7^(n+4)-3*2^(n+3))/840. - Yahia Kahloune, Jun 06 2013

Crossrefs

Sequence in context: A028083 A028122 A028081 * A028119 A028069 A028007

Adjacent sequences: A028006 A028007 A028008 * A028010 A028011 A028012

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved