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Numbers of the form 12n+7 for which Sum_{i=0..(4n+2)} J(i,12n+7) = 0, where J(i,m) is the Jacobi symbol.
5

%I #3 Mar 31 2012 13:21:19

%S 475,775,847,931,1519,1975,2275,2299,2695,3475,3703,3775,4975,5047,

%T 5203,5275,5491,5635,5887,6475,6775,6811,7267,7975,8275,9163,9295,

%U 9475,9559,9583,9751,9775,10051,10927,10975,11191,11275,11875,12427

%N Numbers of the form 12n+7 for which Sum_{i=0..(4n+2)} J(i,12n+7) = 0, where J(i,m) is the Jacobi symbol.

%C Conjecture: a subset of A165603. See conjectures in A165460 and A165462.

%H A. Karttunen, <a href="/A165463/b165463.txt">Table of n, a(n) for n = 0..1000</a>

%Y a(n) = A004767(A165462(n)).

%K nonn

%O 0,1

%A _Antti Karttunen_, Oct 06 2009