A235327 Number of ordered pairs of endofunctions f, g on a set of n elements satisfying f(f(x)) = g(g(x)).

1, 1, 6, 69, 1144, 25045, 708336, 24564211, 1020980640, 49909891257

Offset: 0

Author

Chad Brewbaker, Mar 26 2014

Keywords

• nonn
• more

Crossrefs

Cf. A000949, A060905.

Extensions

a(6)-a(7) from Giovanni Resta, Mar 26 2014

a(8)-a(9) from Giovanni Resta, Mar 28 2014