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 A116340 #2 Mar 30 2012 17:40:40 %S A116340 2,33,61,805,4779,5215,7407,48208887,51791107,77620652,4291816089, %T A116340 4482541431,5517458563,5708183905,9036996877,9737360644, %U A116340 3579205562000136225339579332,3939042613182345526485238180 %N A116340 n times n+7 gives the concatenation of two numbers m and m+7. %Y A116340 Cf. A116209, A116332, A116339, A116341, A116346. %K A116340 nonn,base %O A116340 1,1 %A A116340 _Giovanni Resta_, Feb 06 2006