The least k such that the polynomial cyclotomic(k,x) has n different coefficients.

Terms

a(0) =2a(1) =1a(2) =12a(3) =105a(4) =330a(5) =385a(6) =770a(7) =1365a(8) =1995a(9) =1785a(10) =3570a(11) =5610a(12) =2805a(13) =6279a(14) =3135a(15) =14245a(16) =13209a(17) =6545a(18) =7917a(19) =12903a(20) =17017a(21) =21385a(22) =22715a(23) =11165a(24) =22330a(25) =21505a(26) =29393a(27) =20930a(28) =10465a(29) =16555