A166086 Number of times Sum_{i=1..u} J(i,4n+3) obtains value zero when u ranges from 1 to (4n+3). Here J(i,k) is the Jacobi symbol.

1, 1, 3, 1, 5, 1, 17, 1, 5, 1, 11, 1, 13, 1, 5, 5, 15, 1, 29, 1, 13, 1, 9, 1, 32, 5, 17, 1, 15, 1, 37, 11, 5, 17, 15, 1, 90, 1, 17, 1, 27, 1, 29, 9, 17, 1, 37, 1, 15, 1, 39, 50, 19, 1, 37, 13, 25, 1, 25, 1, 161, 19, 5, 1, 17, 1, 53, 1, 84, 5, 41, 1, 29, 11, 5, 1, 45, 1, 62, 3, 51, 1, 19

Offset

0,3

Links

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

Crossrefs

a(n) = A166040(A005408(n)). Bisection of A166040. A165468 gives the positions of 1's, and respectively, A166052, A166054, A166056 and A166058 give the positions of 3's, 5's, 7's and 9's in this sequence. Note how 3's seem to be more rare than 5's, and 7's more rare than 9's.

Sequence in context: A160085 A147024 A146378 * A232101 A176249 A083722

Adjacent sequences: A166083 A166084 A166085 * A166087 A166088 A166089

Keyword

nonn

Author

Antti Karttunen, Oct 08 2009

Status

approved