Number of n-bead necklaces labeled with numbers -7..7 allowing reversal, with sum zero and avoiding the patterns z z+1 z+2 and z z-1 z-2.
A209484
Number of n-bead necklaces labeled with numbers -7..7 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) =8a(2) =31a(3) =311a(4) =3014a(5) =34233a(6) =401634a(7) =4907310a(8) =61316012a(9) =780896062a(10) =10092511209
External references
- oeis: A209484