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%I #9 Jul 18 2014 12:17:30
%S 1,1,10,159,3568,106545,4062336,192754009
%N Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(f(g(x))) = g(f(x)).
%Y Cf. A181162.
%K nonn,more
%O 0,3
%A _Chad Brewbaker_, Mar 26 2014
%E a(6)-a(7) from _Giovanni Resta_, Mar 28 2014
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