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A025968 Expansion of 1/((1-2x)(1-4x)(1-6x)(1-10x)). 0
1, 22, 320, 3920, 44016, 471072, 4904320, 50237440, 509670656, 5141007872, 51677982720, 518395637760, 5193684791296, 51995352604672, 520305091051520, 5205162447994880, 52064302294695936, 520719124195049472 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..17.

Index entries for linear recurrences with constant coefficients, signature (22, -164, 488, -480).

FORMULA

a(n) = -2^n/8 +8*4^n/3 -27*6^n/4 +125*10^n/24. - R. J. Mathar, Jun 20 2013

MATHEMATICA

CoefficientList[Series[1/((1-2x)(1-4x)(1-6x)(1-10x)), {x, 0, 30}], x] (* or *) LinearRecurrence[{22, -164, 488, -480}, {1, 22, 320, 3920}, 30] (* Harvey P. Dale, Dec 30 2014 *)

CROSSREFS

Sequence in context: A025972 A028029 A022453 * A025948 A021904 A022343

Adjacent sequences:  A025965 A025966 A025967 * A025969 A025970 A025971

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified November 17 21:13 EST 2018. Contains 317279 sequences. (Running on oeis4.)