%I A109017
%S A109017 0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,
%T A109017 1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,
%U A109017 0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0
%V A109017 0,1,0,0,0,1,0,1,0,0,0,1,0,-1,0,0,0,-1,0,-1,0,0,0,-1,0,1,0,0,0,1,0,1,0,
               0,0,1,0,-1,0,0,
%W A109017 0,-1,0,-1,0,0,0,-1,0,1,0,0,0,1,0,1,0,0,0,1,0,-1,0,0,0,-1,0,-1,0,0,0,-1,
               0,1,0,0,0,1,0,
%X A109017 1,0,0,0,1,0,-1,0,0,0,-1,0,-1,0,0,0,-1,0,1,0,0,0,1,0,1,0
%N A109017 Kronecker symbol (-6/n).
%H A109017 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               KroneckerSymbol.html">Kronecker Symbol</a>
%F A109017 Euler transform of length 24 sequence [0, 0, 0, 1, 0, 1, 0, -1, 0, 0, 
               0, -2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1].
%F A109017 a(24+n)=a(n)=-a(-n).
%F A109017 G.f.: x*(1+x^6)/ (1-x^4+x^8) = x*(1-x^8)*(1-x^12)^2/ ((1-x^4)*(1-x^6)*(1-x^24)).
%o A109017 (PARI) a(n)=kronecker(-6,n)
%o A109017 (PARI) a(n)=(n%2)*(n%3!=0)*(-1)^(n\12)
%Y A109017 Sequence in context: A153638 A122415 A071038 this_sequence A110161 A134667 
               A117943
%Y A109017 Adjacent sequences: A109014 A109015 A109016 this_sequence A109018 A109019 
               A109020
%K A109017 sign
%O A109017 0,1
%A A109017 Michael Somos, Jun 16 2005