13031514domain: NAppears in sequencesNumber of partitions into pairs.at n=8A006198d(n,s) = number of perfect matchings on {1, 2, ..., n} with s short pairs.at n=46A079267Number of maximal matchings in the n-path complement graph.at n=16A302749Number of maximum matchings in the n-path complement graph.at n=16A302750