Number of aperiodic necklaces (Lyndon words) with k<=6 black beads and n-k white beads.

Terms

a(0) =1a(1) =2a(2) =1a(3) =2a(4) =3a(5) =6a(6) =9a(7) =18a(8) =29a(9) =51a(10) =82a(11) =135a(12) =205a(13) =315a(14) =458a(15) =662a(16) =925a(17) =1281a(18) =1724a(19) =2305a(20) =3014a(21) =3911a(22) =4992a(23) =6326a(24) =7905a(25) =9820a(26) =12059a(27) =14724a(28) =17811a(29) =21435