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Integers of the form 4n+3 for which Sum_{i=1..u} J(i,4n+3) obtains value zero exactly 3 times, when u ranges from 1 to (4n+3). Here J(i,k) is the Jacobi symbol.
2

%I #2 Mar 31 2012 13:21:20

%S 11,319,607,703,895,1063,1103,1135,1447,1495,2287,2383,2543,3223,3967,

%T 4255,4615,4807,5143,5207,5407,5695,5783,5983,6247,6487,6607,6799,

%U 6943,7495,7927,8503,9103,9127,9655,10183,10615,10735,12055,13207

%N Integers of the form 4n+3 for which Sum_{i=1..u} J(i,4n+3) obtains value zero exactly 3 times, when u ranges from 1 to (4n+3). Here J(i,k) is the Jacobi symbol.

%C Second row of A166092.

%Y a(n) = A004767(A166052(n)).

%K nonn

%O 1,1

%A _Antti Karttunen_, Oct 08 2009