Number of n-bead necklaces labeled with numbers -4..4 not allowing reversal, with sum zero and three times sum of squares <= n*(4)*(4+1).
A208810
Number of n-bead necklaces labeled with numbers -4..4 not allowing reversal, with sum zero and three times sum of squares <= n*(4)*(4+1).
Terms
- a(0) =1a(1) =3a(2) =13a(3) =82a(4) =455a(5) =3375a(6) =22939a(7) =164311a(8) =1295113a(9) =9606295a(10) =73033205a(11) =600317013a(12) =4678388841a(13) =36709902179a(14) =309541490733
External references
- oeis: A208810