Number of 6-bead necklaces where each bead is an unlabeled rooted tree, by total number of nodes.

A058855

Number of 6-bead necklaces where each bead is an unlabeled rooted tree, by total number of nodes.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =8a(4) =22a(5) =52a(6) =142a(7) =362a(8) =973a(9) =2574a(10) =6935a(11) =18643a(12) =50573a(13) =137401a(14) =375306a(15) =1027898a(16) =2825831a(17) =7790055a(18) =21539352a(19) =59706865a(20) =165921896a(21) =462127857a(22) =1289901083a(23) =3607567539a(24) =10108555623a(25) =28374358327a(26) =79777757405a(27) =224653284863

External references