%I A102393
%S A102393 1,0,0,4,0,6,7,0,0,10,11,0,13,0,0,16,0,18,19,0,21,0,0,24,25,0,0,28,0,30,
%T A102393 31,0,0,34,35,0,37,0,0,40,41,0,0,44,0,46,47,0,49,0,0,52,0,54,55,0,0,58,
%U A102393 59,0,61,0,0,64,0,66,67,0,69,0,0,72,73,0,0,76,0,78,79,0,81,0,0,84,0,86
%N A102393 A wicked evil sequence.
%C A102393 Elements of A026147 (evil numbers plus one) appear at positions indexed 
               by the evil numbers A001969, 0 otherwise. A000027(n)=A102393(n)+A102394(n).
%C A102393 Comment from Jeremy Gardiner, Dec 28 2008: The following sequences all 
               appear to have the same parity: A003071, A029886, A061297, A092524, 
               A093431, A102393, A104258, A122248, A128975.
%F A102393 a(n)=(n+1)(1+(-1)^A000120(n))/2; a(n)=(n+1)(1+(-1)^A010060(n))/2.
%Y A102393 Cf. A102391.
%Y A102393 Sequence in context: A019629 A073759 A066760 this_sequence A019833 A155743 
               A027857
%Y A102393 Adjacent sequences: A102390 A102391 A102392 this_sequence A102394 A102395 
               A102396
%K A102393 easy,nonn
%O A102393 0,4
%A A102393 Paul Barry (pbarry(AT)wit.ie), Jan 06 2005