OFFSET
1,3
COMMENTS
a(n) = -1 iff n = 2^k, k>0.
LINKS
Rémy Sigrist, Table of n, a(n) for n = 1..10000
Rémy Sigrist, PARI program
PROG
(PARI) See Links section.
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Apr 04 2022
STATUS
approved