a(n) = n^degree(C(n,x))/discriminant(C(n,x)) for the minimal polynomials C(n,x) of 2*cos(Pi/n), given in A187360.
A215041
a(n) = n^degree(C(n,x))/discriminant(C(n,x)) for the minimal polynomials C(n,x) of 2*cos(Pi/n), given in A187360.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =2a(4) =5a(5) =3a(6) =7a(7) =2a(8) =9a(9) =5a(10) =11a(11) =9a(12) =13a(13) =7a(14) =45a(15) =2a(16) =17a(17) =27a(18) =19a(19) =25a(20) =189a(21) =11a(22) =23a(23) =81a(24) =125a(25) =13a(26) =243a(27) =49a(28) =29a(29) =2025
External references
- oeis: A215041