186501domain: NAppears in sequencesExpansion of 1/((1-7*x)*(1-8*x)*(1-9*x)*(1-10*x)).at n=4A016109Number of asymmetric types of (3,n)-hypergraphs without isolated nodes, under action of symmetric group S_3; asymmetric n-covers of an unlabeled 3-set.at n=18A055538