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 A116245 #2 Mar 30 2012 17:40:40 %S A116245 8,698,775,789,866,42336,57656,96882,44121665,55878327,85298136, %T A116245 36680703009575609347721358492,63319296990424390652278641500, %U A116245 69346342454876071597336150480,81501115172242572470460459682 %N A116245 n times n+9 gives the concatenation of two numbers m and m-7. %e A116245 85298136 * 85298145 = 72757727//72757720, where // denotes %e A116245 concatenation. %Y A116245 Cf. A116114, A116240, A116244, A116258. %K A116245 nonn,base %O A116245 1,1 %A A116245 _Giovanni Resta_, Feb 06 2006