OFFSET
0,12
COMMENTS
The sequence indicates about a possible bias (or lack of it) in the distribution of squarefree numbers among the numbers of the form 4k+1 vs. the numbers of the form 4k+3. See A293429 for another version.
The first negative term is a(1702) = -1.
LINKS
Antti Karttunen, Table of n, a(n) for n = 0..10000
Hans Havermann, Plot of n, a(n) for n = 0..200000
Hans Havermann, Plot of n, a(n) for n = 0..10^7
PROG
CROSSREFS
KEYWORD
sign
AUTHOR
Antti Karttunen, Oct 12 2017
STATUS
approved