OFFSET
0,3
COMMENTS
a(n) is even for n >= 1.
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..3323
MAPLE
b:= proc(n) option remember; (t-> t-3^ilog[3](t))(2^n) end:
a:= n-> b(n+1)-b(n):
seq(a(n), n=0..40);
CROSSREFS
KEYWORD
sign
AUTHOR
Alois P. Heinz, Oct 12 2019
STATUS
approved