OFFSET
0,3
COMMENTS
A051179 is a bisection of this sequence.
MATHEMATICA
Array[Floor[2^(2^(#/2)) - 1] &, 15, 0] (* Michael De Vlieger, Jan 04 2019 *)
PROG
(PARI) a(n) = floor(2^(2^(n/2)))-1; \\ Michel Marcus, Jan 15 2019
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Greg Huber, Dec 28 2018
STATUS
approved