This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A085186 #6 Jan 12 2024 10:58:04 %S A085186 0,1,10,11,13,100,101,110,111,113,130,131,133,203,1000,1001,1010,1011, %T A085186 1013,1100,1101,1110,1111,1113,1130,1131,1133,1203,1300,1301,1310, %U A085186 1311,1313,1330,1331,1333,2003,2030,2031,2033,2103,2123,10000,10001,10010 %N A085186 Sequence A085195 shown in base 4. %F A085186 a(n) = A007090(A085195(n)). %K A085186 nonn,base %O A085186 0,3 %A A085186 _Antti Karttunen_, Jun 14 2003