Number of necklace compositions of n with distinct multiplicities.

Terms

a(0) =1a(1) =2a(2) =2a(3) =4a(4) =5a(5) =7a(6) =11a(7) =16a(8) =18a(9) =41a(10) =86a(11) =118a(12) =273a(13) =465a(14) =731a(15) =1432a(16) =2791a(17) =4063a(18) =8429a(19) =14761a(20) =29465a(21) =58654a(22) =123799a(23) =227419a(24) =453229a(25) =861909a(26) =1697645a(27) =3192807a(28) =6315007a(29) =11718879