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 A112322 #6 Mar 31 2012 10:26:05 %S A112322 4,289,24649,2393209,227828836,41566646641,0,0,0 %N A112322 Exclusionary square associated to corresponding smallest n-digit number (A112321), or 0 if no such number exists. %C A112322 m has an exclusionary square if m consists of distinct digits and m^2 is made up only of digits not appearing in m. %Y A112322 Cf. A112321, A110816. %K A112322 nonn,base,fini %O A112322 1,1 %A A112322 _Lekraj Beedassy_ and _Klaus Brockhaus_, Sep 08 2005