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A167543 a(n) = (n-5)*(n-6)*(n-7)*(n-16)/24. 1
-2, -7, -15, -25, -35, -42, -42, -30, 0, 55, 143, 273, 455, 700, 1020, 1428, 1938, 2565, 3325, 4235, 5313, 6578, 8050, 9750, 11700, 13923, 16443, 19285, 22475, 26040, 30008, 34408, 39270, 44625, 50505, 56943, 63973, 71630, 79950, 88970, 98728, 109263, 120615 (list; graph; refs; listen; history; text; internal format)
OFFSET

8,1

LINKS

G. C. Greubel, Table of n, a(n) for n = 8..1000

FORMULA

a(n) = 5*a(n-1) - 10*a(n-2) + 10*a(n-3) - 5*a(n-4) + a(n-5).

G.f.: x^8*(-2+3*x)/(1-x)^5.

MATHEMATICA

Table[(n - 5)*(n - 6)*(n - 7)*(n - 16)/24, {n, 8, 100}] (* G. C. Greubel, Jun 15 2016 *)

CROSSREFS

Cf. A135929, A137276.

Sequence in context: A070898 A132746 A252475 * A184976 A194140 A029888

Adjacent sequences:  A167540 A167541 A167542 * A167544 A167545 A167546

KEYWORD

sign,easy

AUTHOR

Jamel Ghanouchi, Nov 06 2009

EXTENSIONS

Definition simplified, sequence extended by R. J. Mathar, Nov 12 2009

STATUS

approved

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Last modified December 10 23:13 EST 2016. Contains 279021 sequences.