A165573 Legendre symbol (n,257).

0, 1, 1, -1, 1, -1, -1, -1, 1, 1, -1, 1, -1, 1, -1, 1, 1, 1, 1, -1, -1, 1, 1, 1, -1, 1, 1, -1, -1, 1, 1, 1, 1, -1, 1, 1, 1, -1, -1, -1, -1, -1, 1, -1, 1, -1, 1, -1, -1, 1, 1, -1, 1, -1, -1, -1, -1, 1, 1, 1, 1, 1, 1, -1, 1, -1, -1, 1, 1, -1, 1, -1, 1, 1, -1, -1, -1, -1, -1, 1, -1, 1

Offset: 0

Author

Antti Karttunen, Sep 22 2009

Keywords

• sign
• mult

Comments

257 is the 3rd Fermat prime, A019434(3).

Links

• A. Karttunen, Table of n, a(n) for n = 0..257

Crossrefs

Partial sums: A165575.

Programs

PARI

a(n) = kronecker(n, 257); \\ Michel Marcus, Mar 12 2017