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 A116235 #2 Mar 30 2012 17:40:40 %S A116235 79,8155,9799,467345,532652,997999,76450587,99979999,7801738413, %T A116235 8593817621,9208120791,9999799999,346667333465,401461854013, %U A116235 598538145984,653332666532,945207479451,999997999999,48349470735058 %N A116235 n times n+4 gives the concatenation of two numbers m and m-8. %Y A116235 Cf. A116104, A116227, A116234, A116236, A116248. %K A116235 nonn,base %O A116235 1,1 %A A116235 _Giovanni Resta_, Feb 06 2006