Number of n-bead necklaces labeled with numbers -7..7 not allowing reversal, with sum zero and avoiding the pattern z z+1 z+2.
A209072
Number of n-bead necklaces labeled with numbers -7..7 not allowing reversal, with sum zero and avoiding the pattern z z+1 z+2.
Terms
- a(0) =1a(1) =8a(2) =56a(3) =563a(4) =6006a(5) =68723a(6) =817594a(7) =10030238a(8) =125899533a(9) =1609360719a(10) =20877938573a(11) =274173012896
External references
- oeis: A209072