Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(x) = f(f(g(x))).
A239760
Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(x) = f(f(g(x))).
Terms
- a(0) =1a(1) =1a(2) =10a(3) =123a(4) =1984a(5) =38765a(6) =899856a(7) =24135055a(8) =734381824a(9) =24985937241a(10) =939674886400
External references
- oeis: A239760