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A011899 a(n) = floor(n*(n-1)*(n-2)/17). 1
0, 0, 0, 0, 1, 3, 7, 12, 19, 29, 42, 58, 77, 100, 128, 160, 197, 240, 288, 342, 402, 469, 543, 625, 714, 811, 917, 1032, 1156, 1289, 1432, 1586, 1750, 1925, 2112, 2310, 2520, 2742, 2977, 3225, 3487, 3762, 4051 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

LINKS

Table of n, a(n) for n=0..42.

FORMULA

G.f.: (x^4*(1+x^2-x^3+x^4+x^5+x^9+x^10-x^11+x^12+x^13-x^14+x^15))/(1+x*(-3+x*(3+x*(-1+(-1+x)^3*x^14)))). - Peter J. C. Moses, Jun 02 2014

MAPLE

A011899:=n->floor(n*(n-1)*(n-2)/17): seq(A011899(n), n=0..100); # Wesley Ivan Hurt, Jan 22 2017

PROG

(PARI) a(n) = n*(n-1)*(n-2)\17; \\ Michel Marcus, Jan 23 2017

CROSSREFS

Cf. A007531.

Sequence in context: A122793 A062714 A039677 * A002498 A172115 A091369

Adjacent sequences:  A011896 A011897 A011898 * A011900 A011901 A011902

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified October 15 04:42 EDT 2018. Contains 316200 sequences. (Running on oeis4.)