A166085 Number of times Sum_{i=1..u} J(i,4n+1) obtains value zero when u ranges from 1 to (4n+1). Here J(i,k) is the Jacobi symbol.

0, 2, 0, 4, 4, 6, 0, 8, 4, 8, 8, 20, 0, 14, 6, 10, 8, 14, 8, 20, 0, 10, 14, 20, 8, 24, 12, 12, 14, 38, 0, 74, 10, 18, 12, 22, 10, 22, 38, 22, 14, 18, 0, 30, 8, 20, 24, 62, 8, 36, 14, 14, 20, 36, 12, 26, 0, 18, 18, 28, 14, 118, 16, 22, 26, 68, 12, 42, 10, 24, 18, 34, 0, 36, 44

Offset

0,2

Comments

All terms are even.

Links

A. Karttunen, Table of n, a(n) for n = 0..65536

Crossrefs

a(n) = A166040(A005843(n)). Bisection of A166040.

Sequence in context: A316987 A228885 A323910 * A129760 A291330 A360133

Adjacent sequences: A166082 A166083 A166084 * A166086 A166087 A166088

Keyword

nonn

Author

Antti Karttunen, Oct 08 2009

Status

approved