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 A116310 #2 Mar 30 2012 17:40:40 %S A116310 2,4,88,3676,6320,8786,48743,51253,87617,3762554,6237442,9217100, %T A116310 3266298274,3520463764,6479536232,6733701722,8063694648,8317860138, %U A116310 4689524709430934474,5310475290569065522,7416797436703661747 %N A116310 n times n+5 gives the concatenation of two numbers m and m+3. %Y A116310 Cf. A116179, A116303, A116309, A116311, A116324. %K A116310 nonn,base %O A116310 1,1 %A A116310 _Giovanni Resta_, Feb 06 2006