Number of n-bead necklaces labeled with numbers -5..5 not allowing reversal, with sum zero and avoiding the pattern z z+1 z+2.
A209070
Number of n-bead necklaces labeled with numbers -5..5 not allowing reversal, with sum zero and avoiding the pattern z z+1 z+2.
Terms
- a(0) =1a(1) =6a(2) =30a(3) =223a(4) =1722a(5) =14431a(6) =125428a(7) =1125484a(8) =10331019a(9) =96583955a(10) =916363757a(11) =8801147754a(12) =85402605777
External references
- oeis: A209070