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 A014892 #5 Mar 30 2012 17:28:13 %S A014892 42768,44921,44922,44923,44924,44925,46656,89424,91577,91578,91579, %T A014892 91580,91581,93312,136080,138233,138234,138235,138236,138237,139968, %U A014892 182736,184889,184890,184891,184892,184893 %N A014892 n is equal to the number of 4s in all numbers <= n written in base 6. %Y A014892 Cf. A014778. %K A014892 nonn,base,fini,full %O A014892 1,1 %A A014892 _Olivier Gérard_ %E A014892 List proved complete by _Hugo van der Sanden_ (cf. A014886).