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 A239765 #9 Jul 18 2014 12:40:53 %S A239765 1,1,10,189,6304,315065,21848976,1992930037 %N A239765 Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(f(g(x))) = g(g(g(x))). %Y A239765 Cf. A181162. %K A239765 nonn,more %O A239765 0,3 %A A239765 _Chad Brewbaker_, Mar 26 2014 %E A239765 a(6)-a(7) from _Giovanni Resta_, Mar 28 2014