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 A116323 #3 Mar 30 2012 17:40:40 %S A116323 463,534,716,820,3426,6571,90905,980200,3636359,6363638,41176466, %T A116323 58823531,413533836,426573428,428571424,432620007,567379990,571428573, %U A116323 573426569,586466161,686261109,725274727,727272723,731321306 %N A116323 n times n+4 gives the concatenation of two numbers m and m+5. %Y A116323 Cf. A115430, A116317, A116322, A116324, A116337. %K A116323 nonn,base %O A116323 1,1 %A A116323 _Giovanni Resta_, Feb 06 2006