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 A036463 #8 Oct 14 2012 12:58:14 %S A036463 42,281,375,416,593,736,907,975,1096,1193,1298,1330,1401,1420,1463, %T A036463 1577,1633,1707,2281,2288,2460,2712,2759,3085,3135,3412,3599,3722, %U A036463 3823,4328,4337,4365,4546,4711,5116,5215,5243,5291,5299,5415,5436,5449,5710,5726 %N A036463 Conjecturally, a power of 2 written in base 3 cannot have this many 2's. %K A036463 base,nonn %O A036463 1,1 %A A036463 _David W. Wilson_