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 A104654 #5 Mar 30 2012 17:36:53 %S A104654 1,2,4,9,5,20,11,34,17,23,29,37,41,47,53,61,71,79,89,97,107,127,131, %T A104654 149,157,167,181,197,211,227,241,257,277,293,307,331,347,367,389,409, %U A104654 431,449,467,491,521,541,563,587,613,641,673,691,719,751,773,809,839,863 %N A104654 Leading entry in row n of triangle A101513. %Y A104654 Cf. A101513, A104655, A104656. %K A104654 nonn,easy %O A104654 1,2 %A A104654 _N. J. A. Sloane_, Apr 22 2005 %E A104654 More terms from _Joshua Zucker_, May 20 2006