a(n) = the number of aperiodic subsets S of the n-th roots of 1 with zero sum (i.e., there is no r different from 1 such that r*S=S).

A110981

a(n) = the number of aperiodic subsets S of the n-th roots of 1 with zero sum (i.e., there is no r different from 1 such that r*S=S).

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =0a(11) =2a(12) =0a(13) =0a(14) =0a(15) =0a(16) =0a(17) =24a(18) =0a(19) =6a(20) =0a(21) =0a(22) =0a(23) =236a(24) =0a(25) =0a(26) =0a(27) =18a(28) =0a(29) =3768

External references