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 A116319 #3 Mar 30 2012 17:40:40 %S A116319 77,4328,5666,9365,41505566065992219342,44035313091289689595, %T A116319 46429818586950933764,48959565612248404017,51040434387751595977, %U A116319 53570181413049066230,55964686908710310399,58494433934007780652 %N A116319 n times n+7 gives the concatenation of two numbers m and m+4. %e A116319 9365 * 9372 = 8776//8780, where // denotes concatenation. %Y A116319 Cf. A116133, A116311, A116318, A116320, A116326. %K A116319 nonn,base %O A116319 1,1 %A A116319 _Giovanni Resta_, Feb 06 2006