OFFSET
1,4
COMMENTS
Conjectures: Max a(n) = 15 for n = 195, 403, 434. For n >= 687, a(n) < 0.
First term < 0: a(538) = -1.
LINKS
Jaroslav Krizek, Table of n, a(n) for n = 1..10000
CROSSREFS
KEYWORD
sign
AUTHOR
Jaroslav Krizek, Dec 25 2011
STATUS
approved