A239782 Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(g(f(x))) = f(f(g(x))).
1, 1, 14, 321, 12256, 682985, 52551216, 5333977789
Offset: 0
Crossrefs
Cf. A181162.
Extensions
a(6)-a(7) from Giovanni Resta, Mar 28 2014