T(n,k) = number of n-bead necklaces labeled with numbers -k..k not allowing reversal, with sum zero and first and second differences in -k..k.
A209007
T(n,k) = number of n-bead necklaces labeled with numbers -k..k not allowing reversal, with sum zero and first and second differences in -k..k.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =1a(11) =2a(12) =3a(13) =3a(14) =1a(15) =1a(16) =2a(17) =3a(18) =5a(19) =5a(20) =2a(21) =1a(22) =2a(23) =3a(24) =10a(25) =13a(26) =10a(27) =3a(28) =1a(29) =2
External references
- oeis: A209007