Cyclotomic polynomials at x=-12.

Terms

a(0) =-12a(1) =-13a(2) =-11a(3) =133a(4) =145a(5) =19141a(6) =157a(7) =2756293a(8) =20737a(9) =2984257a(10) =22621a(11) =57154490053a(12) =20593a(14) =3257437a(15) =465542221a(16) =429981697a(18) =2987713a(20) =427016305