a(n) = degree in N of the number of orbits under S_N of the set of n-tuples of partitions of {1,...,N} into n subsets.

A140124

a(n) = degree in N of the number of orbits under S_N of the set of n-tuples of partitions of {1,...,N} into n subsets.

Terms

    a(0) =1a(1) =20a(2) =243a(3) =3104a(4) =46625a(5) =823500a(6) =16777159a(7) =387420416a(8) =9999999909a(9) =285311670500

External references