Number of n-bead necklaces labeled with numbers -5..5 allowing reversal, with sum zero and avoiding the patterns z z+1 z+2 and z z-1 z-2.
A209482
Number of n-bead necklaces labeled with numbers -5..5 allowing reversal, with sum zero and avoiding the patterns z z+1 z+2 and z z-1 z-2.
Terms
- a(0) =1a(1) =6a(2) =17a(3) =128a(4) =866a(5) =7179a(6) =60778a(7) =541494a(8) =4926728a(9) =45758958a(10) =431242307a(11) =4115192739
External references
- oeis: A209482