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 A277250 #14 Nov 07 2016 06:17:22 %S A277250 0,3,6,9,12,30,18,63,24,54,60,33,36,91,126,90,48,102,108,190,120,189, %T A277250 154,207,72,250,234,243,252,0,180,248,96,198,204,315,216,148,228,351, %U A277250 240,0,378,430,132,270,506,423,144,490,300,459,364,477,486,440,504 %N A277250 Largest number that is n times sum of its digits when written in base 4. %H A277250 Daniel Mondot, <a href="/A277250/b277250.txt">Table of n, a(n) for n = 0..10000</a> %F A277250 a(n) = 0 for n in A058900. - _Michel Marcus_, Oct 09 2016 %Y A277250 Cf. A058900, A065880, A277249, A277291, A052489. %K A277250 base,nonn,look %O A277250 0,2 %A A277250 _Daniel Mondot_, Oct 06 2016