%I #7 Jul 30 2020 12:19:08
%S 1,3,4,5,7,9,12,15,16,17,20,21,25,27,28,35,36,37,41,43,45,47,48,49,51,
%T 59,60,63,64,67,68,75,79,80,81,83,84,85,89,100,101,105,108,109,111,
%U 112,119,121,123,125,127,129,131,135,140,141,144,147,148,151,153
%N Indices of the nonzero terms in expansion of Dirichlet series Product_p (1-(Kronecker(m,p)+1)*p^(-s)+Kronecker(m,p)*p^(-2s))^(-1) for m= 21.
%o (PARI) m=21; select(x -> x, direuler(p=2,101,1/(1-(kronecker(m,p)*(X-X^2))-X)), 1)
%Y Cf. A035203 (the expansion itself).
%K nonn
%O 1,2
%A _N. J. A. Sloane_
%E Edited and extended by _Andrey Zabolotskiy_, Jul 30 2020