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 A058350 #22 Mar 11 2014 11:16:48 %S A058350 1,1,7,73,1051,19381,436087,11585953,354981571,12322179901, %T A058350 477938035807,20485584143113,961567521142411,49054912287659461, %U A058350 2702571588828034567,159911968233095867953,10114120854154243738771,680943323845807848142861 %N A058350 Duplicate of A048174. %K A058350 dead %O A058350 1,3 %A A058350 _N. J. A. Sloane_, Dec 16 2000