Number of n-bead necklaces labeled with numbers -7..7 allowing reversal, with sum zero.
A208824
Number of n-bead necklaces labeled with numbers -7..7 allowing reversal, with sum zero.
Terms
- a(0) =1a(1) =8a(2) =32a(3) =316a(4) =3085a(5) =35288a(6) =417204a(7) =5134796a(8) =64630243a(9) =829140440a(10) =10794728782a(11) =142275197892
External references
- oeis: A208824