A071936 K(n+1,n) where K(x,y) is the Kronecker symbol (x/y).

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, 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

1,1

Links

Table of n, a(n) for n=1..120.

Formula

If n==2 (mod(8)) a(n)=-1 a(n)=1 otherwise

Prog

(PARI) for(n=1, 150, print1(kronecker(n+1, n), ", "))

Crossrefs

Sequence in context: A131561 A110515 A355437 * A005088 A076142 A084904

Adjacent sequences: A071933 A071934 A071935 * A071937 A071938 A071939

Keyword

easy,sign

Author

Benoit Cloitre, Jun 14 2002

Status

approved