Number of n-bead necklaces labeled with numbers -n..n allowing reversal, with sum zero and three times sum of squares <= n^2*(n+1).
A208797
Number of n-bead necklaces labeled with numbers -n..n allowing reversal, with sum zero and three times sum of squares <= n^2*(n+1).
Terms
- a(0) =1a(1) =2a(2) =5a(3) =50a(4) =561a(5) =10372a(6) =243678a(7) =7202490a(8) =247156839a(9) =9762800723a(10) =440697781180
External references
- oeis: A208797