%I #2 Mar 31 2012 13:21:20
%S 1,3,5,11,13,19,21,415,29,91,61,43,105,51,53,67,249,27,133,211,45,491,
%T 141,463,101,227,221,163,237,75,173,451,99,347,285,823,197,123,117,
%U 203,397,283,269,403,297,307,669,651,317,375,207,323,357,267,381,435
%N a(n) = First odd number 2k+1, for which Sum_{i=1..u} J(i,2k+1) obtains value zero exactly n times when u ranges from 1 to (2k+1). Here J(i,k) is the Jacobi symbol.
%Y a(n) = A005408(A166087(n)). Bisections: A166095, A166096. See also: A166097-A166098.
%K nonn
%O 0,2
%A _Antti Karttunen_, Oct 08 2009