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

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =4a(5) =4a(6) =8a(7) =9a(8) =18a(9) =23a(10) =44a(11) =63a(12) =122a(13) =190a(14) =362a(15) =612a(16) =1162a(17) =2056a(18) =3914a(19) =7155a(20) =13648a(21) =25482a(22) =48734a(23) =92205a(24) =176906a(25) =337594a(26) =649532a(27) =1246863a(28) =2405236a(29) =4636390