Number of 2n-bead balanced binary necklaces of fundamental period 2n which are equivalent to their reversed complement, but are not equivalent to their reverse and complement.
A045687
Number of 2n-bead balanced binary necklaces of fundamental period 2n which are equivalent to their reversed complement, but are not equivalent to their reverse and complement.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =2a(4) =4a(5) =12a(6) =24a(7) =56a(8) =112a(9) =238a(10) =480a(11) =992a(12) =1980a(13) =4032a(14) =8064a(15) =16242a(16) =32512a(17) =65280a(18) =130536a(19) =261632a(20) =523260a(21) =1047494a(22) =2095104a(23) =4192256a(24) =8384400a(25) =16773108a(26) =33546240a(27) =67100432a(28) =134201340a(29) =268419072
External references
- oeis: A045687