43930domain: NAppears in sequencesNumber of series-parallel networks with n unlabeled edges. Also called yoke-chains by Cayley and MacMahon.at n=11A000084Number of primes between (prime(n + 1))^Pi and (prime(n))^Pi.at n=37A137380Total number of parts coprime to n in the partitions of n into 9 parts.at n=45A363327