Number of n-bead necklaces labeled with numbers -3..3 allowing reversal, with sum zero and three times sum of squares <= n*(3)*(3+1).
A208800
Number of n-bead necklaces labeled with numbers -3..3 allowing reversal, with sum zero and three times sum of squares <= n*(3)*(3+1).
Terms
- a(0) =1a(1) =3a(2) =5a(3) =24a(4) =99a(5) =518a(6) =2782a(7) =15485a(8) =88835a(9) =524548a(10) =3150568a(11) =19343270a(12) =119596665a(13) =746620321a(14) =4690323708a(15) =29666561267a(16) =188933152165
External references
- oeis: A208800