Number of n-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero and three times sum of squares <= n^2*(n+1).
A208806
Number of n-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero and three times sum of squares <= n^2*(n+1).
Terms
- a(0) =1a(1) =2a(2) =7a(3) =82a(4) =1093a(5) =20409a(6) =486633a(7) =14395011a(8) =494288725a(9) =19525179009
External references
- oeis: A208806