The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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. 3
 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 (list; graph; refs; listen; history; text; internal format)
 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 A057377 Adjacent sequences:  A166082 A166083 A166084 * A166086 A166087 A166088 KEYWORD nonn AUTHOR Antti Karttunen, Oct 08 2009 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 20 20:51 EST 2022. Contains 350472 sequences. (Running on oeis4.)