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 A239785 #9 Jul 18 2014 12:29:02 %S A239785 1,1,14,411,19912,1412745,136537056,17121680443 %N A239785 Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(g(g(x))) = f(g(x)). %Y A239785 Cf. A181162. %K A239785 nonn,more %O A239785 0,3 %A A239785 _Chad Brewbaker_, Mar 26 2014 %E A239785 a(6)-a(7) from _Giovanni Resta_, Mar 28 2014