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 A116241 #2 Mar 30 2012 17:40:40 %S A116241 73,7248,7933,86896,95987,7450774,8912861,3546363535354546353, %T A116241 4635454646463635463,5364545353536364535,6453636464645453645, %U A116241 31993591495513432827263,39229430087220380122375 %N A116241 n times n+3 gives the concatenation of two numbers m and m-7. %e A116241 8912861 * 8912864 = 7943911//7943904, where // denotes %e A116241 concatenation. %Y A116241 Cf. A116110, A116234, A116242, A116253. %K A116241 nonn,base %O A116241 1,1 %A A116241 _Giovanni Resta_, Feb 06 2006