OFFSET
0,1
EXAMPLE
0.2163514676003257842429581537472483...
PROG
(PARI) suminf(n = 1, (cos(n) / 2)^n) \\ Michel Marcus, Jun 08 2019
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Neven Sajko, Jun 08 2019
STATUS
approved