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 A116270 #2 Mar 30 2012 17:40:40 %S A116270 62,45211539,54788454,78317866,72388446037855609175404256, %T A116270 73247326752475247326752671,75267524732673267524732471, %U A116270 76126405447292905676080886,42053270820132695893502981749302 %N A116270 n times n+8 gives the concatenation of two numbers m and m-3. %e A116270 78317866 * 78317874 = 61336887//61336884, where // denotes %e A116270 concatenation. %Y A116270 Cf. A116139, A116257, A116269, A116271, A116277. %K A116270 nonn,base %O A116270 1,1 %A A116270 _Giovanni Resta_, Feb 06 2006