66001domain: NAppears in sequencesNumber of cubic graphs on 2n unlabeled nodes whose connected components are vertex-transitive.at n=28A241167Expansion of Product_{k>=0} (1-x^(3*k+2))^(3*k+2).at n=44A285212a(n) = (3!)^3 * [z^3] hypergeom([], [1,1], z)^n.at n=13A287702