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 A038028 #3 Mar 30 2012 17:37:06 %S A038028 19,28615021,1013,19,43,103,3697,631,181,4793,3947,43,137,149,103, %T A038028 65539,83,222841,91316521,439,463,433,71,281551,233,1201,7537 %N A038028 Position reached by frog in A038027 or 0 if none. A038026(A038027(n)). %Y A038028 Cf. A038025. %K A038028 nonn,hard %O A038028 1,1 %A A038028 _Christian G. Bower_