Number of primitive n-bead necklaces (turning over is allowed) where complements are equivalent.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =5a(7) =8a(8) =14a(9) =21a(10) =39a(11) =62a(12) =112a(13) =189a(14) =352a(15) =607a(16) =1144a(17) =2055a(18) =3885a(19) =7154a(20) =13602a(21) =25472a(22) =48670a(23) =92204a(24) =176770a(25) =337590a(26) =649341a(27) =1246840a(28) =2404872a(29) =4636389