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 A239754 #9 Jul 18 2014 12:13:13 %S A239754 1,1,8,111,2896,119985,7180776,581563129 %N A239754 Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(g(f(x))) = g(g(g(x))). %Y A239754 Cf. A000248, A000949. %K A239754 nonn,more %O A239754 0,3 %A A239754 _Chad Brewbaker_, Mar 26 2014 %E A239754 a(6)-a(7) from _Giovanni Resta_, Mar 28 2014