Number of inequivalent colorful necklaces.

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =1a(5) =4a(6) =3a(7) =8a(8) =11a(9) =20a(10) =31a(11) =64a(12) =105a(13) =202a(14) =367a(15) =696a(16) =1285a(17) =2452a(18) =4599a(19) =8776a(20) =16651a(21) =31838a(22) =60787a(23) =116640a(24) =223697a(25) =430396a(26) =828525a(27) =1598228a(28) =3085465a(29) =5966000