Number of n-bead necklaces labeled with numbers -5..5 allowing reversal, with sum zero and three times sum of squares <= n*(5)*(5+1).
A208802
Number of n-bead necklaces labeled with numbers -5..5 allowing reversal, with sum zero and three times sum of squares <= n*(5)*(5+1).
Terms
- a(0) =1a(1) =4a(2) =12a(3) =84a(4) =561a(5) =4566a(6) =38668a(7) =347219a(8) =3174337a(9) =29584366a(10) =281335070a(11) =2698884632a(12) =26233302819a(13) =257404858844
External references
- oeis: A208802