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 A050632 #11 Oct 15 2019 00:02:47 %S A050632 9,49,1849,18496,103184964,7383508103184964, %T A050632 544680602158273835081031849649 %N A050632 a(n+1) is next smallest nontrivial square containing a(n) as a substring, initial term is 9. %F A050632 a(n) = A050633(n)^2. %Y A050632 Starting with a(2)=49, the sequence is identical to A050630. %Y A050632 Cf. A050633, A048561, A050638. %K A050632 nonn,base,more %O A050632 1,1 %A A050632 _Patrick De Geest_, Jul 15 1999 %E A050632 a(7) from _Max Alekseyev_, Feb 15 2012