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 A116247 #2 Mar 30 2012 17:40:40 %S A116247 45,54,949950,979653,7771781678,7900890079,9920892099,9949999500, %T A116247 38773083432316,41534158410841,47433813119407,52566186880592, %U A116247 58465841589158,61226916567683,72258945037434,86156896546724 %N A116247 n times n+2 gives the concatenation of two numbers m and m-6. %Y A116247 Cf. A116116, A116233, A116246, A116248, A116252. %K A116247 nonn,base %O A116247 1,1 %A A116247 _Giovanni Resta_, Feb 06 2006