543116domain: NAppears in sequencesNumber of isomorphism classes of connected 8-regular loopless multigraphs of order n.at n=7A129425Number of connected 2n-regular loopless multigraphs on 2n unlabeled nodes.at n=4A289986Number of connected n-regular loopless multigraphs on eight unlabeled nodes.at n=8A325474