OFFSET
1,1
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..1000
MATHEMATICA
PROG
(PARI) is(n) = cos(n) < 0; \\ Michel Marcus, Oct 15 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Aug 26 2014
STATUS
approved