Number of 2n-bead balanced binary necklaces of fundamental period 2n which are inequivalent to their reverse, complement and reversed complement.

A045684

Number of 2n-bead balanced binary necklaces of fundamental period 2n which are inequivalent to their reverse, complement and reversed complement.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =8a(6) =32a(7) =168a(8) =616a(9) =2380a(10) =8464a(11) =30760a(12) =109612a(13) =394816a(14) =1420616a(15) =5149940a(16) =18736128a(17) =68553728a(18) =251899620a(19) =929814984a(20) =3445425136a(21) =12814382452a(22) =47817520376a(23) =178982546512a(24) =671813585080

External references