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 A116334 #2 Mar 30 2012 17:40:40 %S A116334 45,47,3180,3454,6538,6812,32423077888994073533,47028976905526474404, %T A116334 49049512306209075907,50950487693790924085,52971023094473525588, %U A116334 67576922111005926459,71498432899270376140,75216895567882908524 %N A116334 n times n+9 gives the concatenation of two numbers m and m+6. %e A116334 6812 * 6821 = 4646//4652, where // denotes concatenation. %Y A116334 Cf. A116203, A116328, A116333, A116342. %K A116334 nonn,base %O A116334 1,1 %A A116334 _Giovanni Resta_, Feb 06 2006