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 A116338 #2 Mar 30 2012 17:40:40 %S A116338 700,777,791,868,42338,57658,96884,44121667,55878329,85298138, %T A116338 36680703009575609347721358494,63319296990424390652278641502, %U A116338 69346342454876071597336150482,81501115172242572470460459684 %N A116338 n times n+5 gives the concatenation of two numbers m and m+7. %e A116338 85298138 * 85298143 = 72757727//72757734, where // denotes %e A116338 concatenation. %Y A116338 Cf. A116207, A116331, A116337, A116339, A116351. %K A116338 nonn,base %O A116338 1,1 %A A116338 _Giovanni Resta_, Feb 06 2006