T(n,k) = number of n-bead necklaces labeled with numbers -k..k not allowing reversal, with sum zero and avoiding the pattern z z+1 z+2.

A209073

T(n,k) = number of n-bead necklaces labeled with numbers -k..k not allowing reversal, with sum zero and avoiding the pattern z z+1 z+2.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =2a(6) =1a(7) =4a(8) =6a(9) =5a(10) =1a(11) =5a(12) =12a(13) =22a(14) =8a(15) =1a(16) =6a(17) =20a(18) =57a(19) =70a(20) =19a(21) =1a(22) =7a(23) =30a(24) =122a(25) =276a(26) =265a(27) =39a(28) =1a(29) =8

External references