%I #2 Mar 31 2012 13:21:18
%S 0,1,16,20,21,256,260,261,320,321,336,340,341,4096,4100,4101,4160,
%T 4161,4176,4180,4181,5120,5121,5136,5140,5141,5376,5380,5381,5440,
%U 5441,5456,5460,5461,65536,65540,65541,65600,65601,65616,65620,65621
%N The positions i where A163355(i) = i, that is, the fixed points of permutation A163355.
%C Alternatively, the positions of zeros in A163900.
%Y a(n) = A000695(A165404(n)). Same sequence in base-4: A165406. See also A163902, A163903, A163910.
%K nonn
%O 0,3
%A _Antti Karttunen_, Sep 19 2009