Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(g(f(x))) = f(f(g(x))).
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))).
Terms
- a(0) =1a(1) =1a(2) =14a(3) =321a(4) =12256a(5) =682985a(6) =52551216a(7) =5333977789
External references
- oeis: A239782