Cyclotomic polynomials at x=12.

Terms

a(0) =12a(1) =11a(2) =13a(3) =157a(4) =145a(5) =22621a(6) =133a(7) =3257437a(8) =20737a(9) =2987713a(10) =19141a(11) =67546215517a(12) =20593a(14) =2756293a(15) =394379701a(16) =429981697a(18) =2984257a(20) =427016305