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 A116263 #2 Mar 30 2012 17:40:40 %S A116263 83,76980,714687,952311,90438188,96320541,32980078899026, %T A116263 34346653774235,42816188292270,42881990066485,57118009933509, %U A116263 57183811707724,65653346225759,67019921100968,81321742742207 %N A116263 n times n+7 gives the concatenation of two numbers m and m-4. %e A116263 96320541 * 96320548 = 92776472//92776468, where // denotes %e A116263 concatenation. %Y A116263 Cf. A116132, A116250, A116262, A116264, A116269. %K A116263 nonn,base %O A116263 1,1 %A A116263 _Giovanni Resta_, Feb 06 2006