%I #2 Mar 31 2012 13:21:20
%S 0,1,3,5,7,15,26,13,62,33,11,35,25,55,59,43,130,71,49,29,99,67,74,167,
%T 79,85,89,95,146,121,316,47,574,115,65,399,127,31,157,199,83,309,81,
%U 193,592,235,137,197,358,277,395,271,191,351,563,119,433,347,229,61
%N a(n) gives the least i, for which A166085(i) = 2n.
%Y a(n) = (A166090(n)-1)/4. See also A166094, A166095.
%K nonn
%O 0,3
%A _Antti Karttunen_, Oct 08 2009