T(n,k) = number of n-bead necklaces labeled with numbers -k..k allowing reversal, with sum zero and three times sum of squares <= n*k*(k+1).

A208805

T(n,k) = number of n-bead necklaces labeled with numbers -k..k allowing reversal, with sum zero and three times sum of squares <= n*k*(k+1).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =1a(7) =3a(8) =4a(9) =3a(10) =1a(11) =3a(12) =5a(13) =11a(14) =3a(15) =1a(16) =4a(17) =8a(18) =24a(19) =33a(20) =15a(21) =1a(22) =4a(23) =12a(24) =50a(25) =99a(26) =105a(27) =22a(28) =1a(29) =5

External references