OFFSET
0,6
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..2000
Index entries for linear recurrences with constant coefficients, signature (3,-3,1,0,0,0,0,0,0,0,1,-3,3,-1).
FORMULA
G.f.: x^4*(1-x+2*x^2-x^3+x^4-x^5+2*x^6-x^8+x^9)/((1-x)^4*(1+x+x^2+x^3+x^4+ x^5+x^6+x^7+x^8+x^9+x^10)). - Peter J. C. Moses, Jun 02 2014
MATHEMATICA
Table[Floor[(n(n-1)(n-2))/22], {n, 0, 80}] (* Harvey P. Dale, Sep 30 2019 *)
PROG
(Magma) [Floor(3*Binomial(n, 3)/11): n in [0..80]]; // G. C. Greubel, Oct 18 2024
(SageMath) [3*binomial(n, 3)//11 for n in range(81)] # G. C. Greubel, Oct 18 2024
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
More terms added by G. C. Greubel, Oct 18 2024
STATUS
approved