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 A163524 #3 Mar 30 2012 18:38:14 %S A163524 5,4,11,5,71,7 %N A163524 The pairs (x,y) such that x^2 = 1+factorial(y). %C A163524 The main entry for this relation is the bisection in A146968. %e A163524 71^2 = 7!+1, which introduces (71,7) into the sequence. %K A163524 nonn,less %O A163524 1,1 %A A163524 _Vincenzo Librandi_, Jul 30 2009 %E A163524 Reference to main sequence added by _R. J. Mathar_, Aug 02 2009