Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(f(g(x))) = g(g(g(x))).
A239765
Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(f(g(x))) = g(g(g(x))).
Terms
- a(0) =1a(1) =1a(2) =10a(3) =189a(4) =6304a(5) =315065a(6) =21848976a(7) =1992930037
External references
- oeis: A239765