Number of n-bead necklaces labeled with numbers -5..5 not allowing reversal, with sum zero and first and second differences in -5..5.
A209004
Number of n-bead necklaces labeled with numbers -5..5 not allowing reversal, with sum zero and first and second differences in -5..5.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =16a(4) =71a(5) =409a(6) =2313a(7) =13561a(8) =77953a(9) =448820a(10) =2597203a(11) =15189895a(12) =89774431a(13) =535825715
External references
- oeis: A209004