A025953 Expansion of g.f. 1/((1-2x)(1-3x)(1-9x)(1-11x)).

1, 25, 420, 5990, 78431, 976275, 11762890, 138612880, 1607750661, 18432396125, 209480782160, 2364808954170, 26557583235691, 297035583017575, 3311510934334230, 36823696010925860, 408634337848437521

Offset

0,2

Links

Table of n, a(n) for n=0..16.

Index entries for linear recurrences with constant coefficients, signature (25, -205, 615, -594).

Formula

G.f.: 1/((1-2*x)*(1-3*x)*(1-9*x)*(1-11*x)).

a(n) = -8*2^n/63 +9*3^n/16 -243*9^n/28 +1331*11^n/144. - R. J. Mathar, Jun 20 2013

Crossrefs

Sequence in context: A022628 A020838 A025975 * A020595 A001456 A021964

Adjacent sequences: A025950 A025951 A025952 * A025954 A025955 A025956

Keyword

nonn,easy

Author

N. J. A. Sloane.

Status

approved