A025980 Expansion of 1/((1-2x)(1-4x)(1-9x)(1-10x)).

1, 25, 413, 5717, 71949, 854517, 9768541, 108728389, 1186801517, 12764197589, 135709713789, 1429715165541, 14950747454605, 155389970948341, 1606842713958557, 16544916327312773, 169737574552541613

Offset

0,2

Links

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

Index entries for linear recurrences with constant coefficients, signature (25,-212,692,-720).

Formula

a(n) = -2^n/14 +16*4^n/15 -729*9^n/35 +125*10^n/6. - R. J. Mathar, Jun 20 2013

Mathematica

CoefficientList[Series[1/((1-2x)(1-4x)(1-9x)(1-10x)), {x, 0, 30}], x] (* Harvey P. Dale, Sep 06 2020 *)

Crossrefs

Sequence in context: A028041 A025995 A023955 * A025978 A028037 A102072

Adjacent sequences: A025977 A025978 A025979 * A025981 A025982 A025983

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved