Number of n-bead necklaces labeled with numbers -n..n allowing reversal, with sum zero with no three beads in a row equal.
A209336
Number of n-bead necklaces labeled with numbers -n..n allowing reversal, with sum zero with no three beads in a row equal.
Terms
- a(0) =1a(1) =3a(2) =7a(3) =72a(4) =883a(5) =16968a(6) =409199a(7) =12099880a(8) =420661470a(9) =16838275108a(10) =762821788869
External references
- oeis: A209336