Related to n-th powers of polynomials: factors complementary to A005730.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =2a(5) =5a(6) =2a(7) =21a(8) =2a(9) =3a(10) =1a(11) =55a(12) =3a(13) =13a(14) =2a(15) =21a(16) =2a(17) =85a(18) =1a(19) =57a(20) =2a(21) =1a(22) =1a(23) =8855a(24) =2a(25) =15a(26) =2a(27) =39a(28) =1a(29) =29