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%I #6 Jan 12 2024 10:58:04
%S 0,1,10,11,13,100,101,110,111,113,130,131,133,203,1000,1001,1010,1011,
%T 1013,1100,1101,1110,1111,1113,1130,1131,1133,1203,1300,1301,1310,
%U 1311,1313,1330,1331,1333,2003,2030,2031,2033,2103,2123,10000,10001,10010
%N Sequence A085195 shown in base 4.
%F a(n) = A007090(A085195(n)).
%K nonn,base
%O 0,3
%A _Antti Karttunen_, Jun 14 2003