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 A025508 #5 Mar 30 2012 18:35:25 %S A025508 3,4,4,13,13,19,19,19,19,28,28,28,28,28,28,100,100,405,405,405,405, %T A025508 405,405,405,608,608,608,608,608,608,608,608,608,608,608,608,608,1096, %U A025508 1096,1096,1096,1096,1096,1096,1096,1096,1096,1096,1096,1096,1096,1096,1096 %N A025508 Least k>1 such that first n terms of A006928 repeat beginning at k-th term. %K A025508 nonn %O A025508 1,1 %A A025508 _David W. Wilson_