OFFSET
0,1
COMMENTS
257 is the 3rd Fermat prime, A019434(3).
LINKS
A. Karttunen, Table of n, a(n) for n = 0..257
PROG
(PARI) a(n) = kronecker(n, 257); \\ Michel Marcus, Mar 12 2017
CROSSREFS
KEYWORD
sign,mult
AUTHOR
Antti Karttunen, Sep 22 2009
STATUS
approved