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 A118280 #4 Mar 30 2012 17:34:56 %S A118280 0,33066,273118,1274522,3613278,7250758,12911636,22655394,25049533, %T A118280 56922533,81539010,85105105,106555658,233296317,286763923,358322750 %N A118280 Conjectured largest number that is not the sum of three (2n+1)-gonal numbers; bisection of A118278. %Y A118280 Cf. A118278-A118285. %K A118280 nonn %O A118280 1,2 %A A118280 _T. D. Noe_, Apr 21 2006 %E A118280 a(11)-a(16) from _Donovan Johnson_, Apr 17 2010