127415domain: NAppears in sequencesNumber of n-covers of an unlabeled 5-set.at n=6A005771Number of 7-covers of an unlabeled n-set.at n=5A055066a(n) = 441*n^2 - 2*n.at n=16A157737Number of unlabeled graphs on n nodes whose components are cycles or complete graphs.at n=35A217067