Number of n-bead necklaces labeled with numbers -7..7 allowing reversal, with sum zero with no three beads in a row equal.
A209343
Number of n-bead necklaces labeled with numbers -7..7 allowing reversal, with sum zero with no three beads in a row equal.
Terms
- a(0) =1a(1) =8a(2) =31a(3) =311a(4) =3045a(5) =34720a(6) =409199a(7) =5016681a(8) =62896466a(9) =803647811a(10) =10420410009a(11) =136780924152
External references
- oeis: A209343