Number of n-bead necklaces labeled with numbers -n..n allowing reversal, with sum zero and first differences in -n..n.
A209024
Number of n-bead necklaces labeled with numbers -n..n allowing reversal, with sum zero and first differences in -n..n.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =23a(4) =187a(5) =2798a(6) =52208a(7) =1210780a(8) =32915700a(9) =1029158718a(10) =36366029268
External references
- oeis: A209024