Number of pairs of functions f, g from a size n set into itself satisfying f(f(g(x))) = f(f(f(x))).
A239774
Number of pairs of functions f, g from a size n set into itself satisfying f(f(g(x))) = f(f(f(x))).
Terms
- a(0) =1a(1) =1a(2) =10a(3) =285a(4) =14176a(5) =1034145a(6) =105764256a(7) =14367333421
External references
- oeis: A239774