Number of bracelets (turnover necklaces) of length n that have no reflection symmetry and consist of 6 white beads and n-6 black beads.

A308401

Number of bracelets (turnover necklaces) of length n that have no reflection symmetry and consist of 6 white beads and n-6 black beads.

Terms

    a(0) =3a(1) =6a(2) =16a(3) =30a(4) =56a(5) =91a(6) =150a(7) =224a(8) =336a(9) =477a(10) =672a(11) =912a(12) =1233a(13) =1617a(14) =2112a(15) =2700a(16) =3432a(17) =4290a(18) =5340a(19) =6552a(20) =8008a(21) =9678a(22) =11648a(23) =13888a(24) =16503a(25) =19448a(26) =22848a(27) =26658a(28) =31008a(29) =35853

External references