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 A116313 #2 Mar 30 2012 17:40:40 %S A116313 3,38569,61423,88696,3686022,6313970,7223061,84319381,98033553, %T A116313 345087246071675410527410,403910775483440116409763, %U A116313 596089224516559883590229,654912753928324589472582 %N A116313 n times n+9 gives the concatenation of two numbers m and m+3. %e A116313 98033553 * 98033562 = 96105783//96105786, where // denotes %e A116313 concatenation. %Y A116313 Cf. A116182, A116306, A116312, A116321. %K A116313 nonn,base %O A116313 1,1 %A A116313 _Giovanni Resta_, Feb 06 2006