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 A172545 #7 Mar 30 2012 18:52:04 %S A172545 0,1,4,0,1,4,0,9,1,4,0,9,1,16,4,0,9,1,16,4,0,9,1,16,4,0,25,9,1,16,4,0, %T A172545 25,9,1,16,4,0,25,9,1,36,16,4,0,25,9,1,36,16,4,0,25,9,1,36,16,4,0,25, %U A172545 9,1,36,16,4,0,49,25,9,1,36,16,4,0,49,25,9,1,36,16,4,0 %N A172545 Squares added to A172412 that produce a square smaller than any subsequent term of A172412. %K A172545 nonn %O A172545 1,3 %A A172545 _Paul Curtz_, Nov 21 2010