Number of necklaces of sets of beads containing a total of n beads.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =13a(6) =19a(7) =35a(8) =59a(9) =107a(10) =187a(11) =351a(12) =631a(13) =1181a(14) =2191a(15) =4115a(16) =7711a(17) =14601a(18) =27595a(19) =52487a(20) =99879a(21) =190745a(22) =364723a(23) =699251a(24) =1342183a(25) =2581427a(26) =4971067a(27) =9587579a(28) =18512791a(29) =35792567