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 A116336 #2 Mar 30 2012 17:40:40 %S A116336 3,89,3677,6321,8787,48744,51254,87618,3762555,6237443,9217101, %T A116336 3266298275,3520463765,6479536233,6733701723,8063694649,8317860139, %U A116336 4689524709430934475,5310475290569065523,7416797436703661748 %N A116336 n times n+3 gives the concatenation of two numbers m and m+7. %Y A116336 Cf. A116205, A116330, A116335, A116337, A116349. %K A116336 nonn,base %O A116336 1,1 %A A116336 _Giovanni Resta_, Feb 06 2006