%I A117942
%S A117942 1,1,2,1,1,2,2,2,4,1,1,2,1,1,2,2,2,4,2,2,4,2,2,4,4,4,8,1,1,2,1,1,2,2,2,
%T A117942 4,1,1,2,1,1,2,2,2,4,2,2,4,2,2,4,4,4,8,2,2,4,2,2,4,4,4,8,2,2,4,2,2,4,4,
%U A117942 4
%V A117942 1,-1,-2,-1,1,2,-2,2,4,-1,1,2,1,-1,-2,2,-2,-4,-2,2,4,2,-2,-4,4,-4,-8,-1,
               1,2,1,-1,-2,2,
%W A117942 -2,-4,1,-1,-2,-1,1,2,-2,2,4,2,-2,-4,-2,2,4,-4,4,8,-2,2,4,2,-2,-4,4,-4,
               -8,2,-2,-4,-2,2,
%X A117942 4,-4,4
%N A117942 a(n)=a(3n)=-a(3n+1)=-a(3n+2)/2.
%C A117942 a(n)=a(3n)/a(0)=a(3n+1)/a(1)=a(3n+2)/a(2). Row sums of A117941. abs(A117942)=A117943.
%Y A117942 Sequence in context: A133098 A145788 A117592 this_sequence A066877 A029255 
               A029272
%Y A117942 Adjacent sequences: A117939 A117940 A117941 this_sequence A117943 A117944 
               A117945
%K A117942 sign
%O A117942 0,3
%A A117942 Paul Barry (pbarry(AT)wit.ie), Apr 05 2006