Number of aperiodic necklaces with n red or blue beads such that two necklaces are equivalent under the operation of simultaneously turning the necklace over and switching the two colors.
A066313
Number of aperiodic necklaces with n red or blue beads such that two necklaces are equivalent under the operation of simultaneously turning the necklace over and switching the two colors.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =6a(6) =9a(7) =18a(8) =28a(9) =57a(10) =93a(11) =181a(12) =315a(13) =612a(14) =1091a(15) =2100a(16) =3855a(17) =7392a(18) =13797a(19) =26436a(20) =49929a(21) =95790a(22) =182361a(23) =350440a(24) =671088a(25) =1292445a(26) =2485504a(27) =4797261a(28) =9256395a(29) =17903316
External references
- oeis: A066313