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A165581
Legendre symbol (n,524287).
2
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, 1, -1
OFFSET
0,1
COMMENTS
524287 is the 7th Mersenne prime, A000668(7) = 2^19 - 1.
Periodic with period 524287. - Charles R Greathouse IV, Aug 06 2012
PROG
(PARI) a(n)=kronecker(n, 524287) \\ Charles R Greathouse IV, Aug 06 2012
CROSSREFS
Partial sums: A165582.
Sequence in context: A165573 A057428 A165574 * A165586 A134824 A165476
KEYWORD
sign,mult,easy
AUTHOR
Antti Karttunen, Sep 22 2009
STATUS
approved