Number of n-bead necklaces labeled with numbers -4..4 allowing reversal, with sum zero and three times sum of squares <= n*(4)*(4+1).
A208801
Number of n-bead necklaces labeled with numbers -4..4 allowing reversal, with sum zero and three times sum of squares <= n*(4)*(4+1).
Terms
- a(0) =1a(1) =3a(2) =8a(3) =50a(4) =239a(5) =1746a(6) =11557a(7) =82577a(8) =648289a(9) =4806475a(10) =36522073a(11) =300186549a(12) =2339239465a(13) =18355175927a(14) =154771130241
External references
- oeis: A208801