3410946domain: NAppears in sequencesNumber of rooted toroidal maps with 2 faces and n vertices and without separating cycles or isthmuses.at n=20A006422a(n) is the number of ways to partition n X n X n cube into 5 noncongruent cuboids.at n=36A384479Expansion of (1/x) * Series_Reversion( x * (1 - x^3 * (1 + x)^3) ).at n=19A389407