A239754 - OEIS

%I #9 Jul 18 2014 12:13:13

%S 1,1,8,111,2896,119985,7180776,581563129

%N 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 Cf. A000248, A000949.

%K nonn,more

%O 0,3

%A _Chad Brewbaker_, Mar 26 2014

%E a(6)-a(7) from _Giovanni Resta_, Mar 28 2014