A165581 Legendre symbol (n,524287).

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

Links

A. Karttunen, Table of n, a(n) for n = 0..524287

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

Adjacent sequences: A165578 A165579 A165580 * A165582 A165583 A165584

Keyword

sign,mult,easy

Author

Antti Karttunen, Sep 22 2009

Status

approved