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 A048561 #10 Dec 19 2014 05:26:14 %S A048561 9,961,9616201,961620162020001,9616201620200016202000200000001, %T A048561 96162016202000162020002000000018891984632653500321758097698025 %N A048561 a(n+1) is next smallest nontrivial square beginning with a(n), initial square is 9. %C A048561 Next terms are 125, 251, 502 and 1003 digits long. %Y A048561 Cf. A048562. %Y A048561 Cf. A048557, A249893, A249894, A048559, A249895, A249896, A249897, A249898. %K A048561 nonn,base %O A048561 0,1 %A A048561 _Patrick De Geest_, May 15 1999