OFFSET
1,1
COMMENTS
See A190053.
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..10000
FORMULA
MATHEMATICA
PROG
(PARI) for(n=1, 30, print1(n + floor(2*n*sin(Pi/3)) + floor(n*(sin(Pi/3))^2), ", ")) \\ G. C. Greubel, Jan 10 2018
(Magma) C<i> := ComplexField(); [n + Floor(2*n*Sin(Pi(C)/3)) + Floor(n*(Sin(Pi(C)/3))^2): n in [1..30]]; // G. C. Greubel, Jan 10 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, May 04 2011
STATUS
approved