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%I #2 Mar 30 2012 17:38:10
%S 1,-3,-2,-1,5,6,7,3,4,5,1,2,3,-11,-10,-9,-13,-12,-11,-15,-14,-13,-7,
%T -6,-5,-9,-8,-7,-11,-10,-9,-3,-2,-1,-5,-4,-3,-7,-6,-5,21,22,23,19,20,
%U 21,17,18,19,25,26,27,23,24,25,21,22,23,29,30,31,27,28,29,25,26,27,13,14,15,11,12,13,9,10,11,17,18,19,15
%N Replace 3^k with (-2)^k in balanced ternary expansion of n.
%C Notation: (3)< n >(2)
%e 5 = +1(9)-1(3)-1(1) -> +1(4)-1(-2)-1(1) = 5 = a(5)
%Y A065364, A065365
%K base,easy,sign
%O 1,2
%A _Marc LeBrun_, Oct 31 2001
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