Triangle of T(n,m) = number of bracelets (necklaces than can be turned over) with m white beads and (2n-m) black ones, for 1<=m<=n.
A073020
Triangle of T(n,m) = number of bracelets (necklaces than can be turned over) with m white beads and (2n-m) black ones, for 1<=m<=n.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =3a(6) =1a(7) =4a(8) =5a(9) =8a(10) =1a(11) =5a(12) =8a(13) =16a(14) =16a(15) =1a(16) =6a(17) =12a(18) =29a(19) =38a(20) =50a(21) =1a(22) =7a(23) =16a(24) =47a(25) =79a(26) =126a(27) =133a(28) =1a(29) =8
External references
- oeis: A073020