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A026391 Expansion of 1/((1-2x)(1-6x)(1-7x)(1-10x)). 0
1, 25, 407, 5489, 66759, 762321, 8356279, 89114113, 932519687, 9629963057, 98523692631, 1001349555297, 10129549127335, 102127457330833, 1027215881948663, 10314453257429441, 103444825304722503 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Conjecture: satisfies a linear recurrence having signature (25, -218, 764, -840). - Harvey P. Dale, Jan 17 2019

LINKS

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

FORMULA

a(n) = -2^n/20 +27*6^n/2 -343*7^n/15 +125*10^n/12. R. J. Mathar, Jun 23 2013

MATHEMATICA

CoefficientList[Series[1/((1-2x)(1-6x)(1-7x)(1-10x)), {x, 0, 20}], x] (* Harvey P. Dale, Jan 17 2019 *)

CROSSREFS

Sequence in context: A028061 A026561 A048908 * A028044 A028057 A260953

Adjacent sequences:  A026388 A026389 A026390 * A026392 A026393 A026394

KEYWORD

nonn,changed

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 19 07:24 EST 2019. Contains 319304 sequences. (Running on oeis4.)