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 A034981 #6 Oct 06 2019 18:14:39 %S A034981 25,225,22201,22221796,2222273881,222222674025,2222222266944, %T A034981 2222222266944,222222222419239441,2222222222222640225, %U A034981 2222222222222640225,2222222222222640225,2222222222222640225,2222222222222206355369284609,22222222222222228256442000196,22222222222222228256442000196,222222222222222222935940601965604,222222222222222222935940601965604,222222222222222222284545443509812489,222222222222222222220398849165671296576 %N A034981 Smallest square starting with a string of n 2's. %Y A034981 Cf. A034980. %K A034981 nonn,base %O A034981 1,1 %A A034981 _Patrick De Geest_, Nov 15 1998 %E A034981 More terms from Francisco Salinas (franciscodesalinas(AT)hotmail.com), Dec 23 2001