Number of n-bead necklaces labeled with numbers -6..6 not allowing reversal, with sum zero with no three beads in a row equal.
A208943
Number of n-bead necklaces labeled with numbers -6..6 not allowing reversal, with sum zero with no three beads in a row equal.
Terms
- a(0) =1a(1) =7a(2) =42a(3) =366a(4) =3376a(5) =33468a(6) =344456a(7) =3656654a(8) =39711890a(9) =439202182a(10) =4929418548a(11) =56004017042a(12) =642825693604
External references
- oeis: A208943