Related to n-th powers of polynomials: factors complementary to A005731.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =12a(6) =1a(7) =2a(8) =3a(9) =10a(10) =1a(11) =12a(12) =1a(13) =14a(14) =15a(15) =2a(16) =1a(17) =12a(18) =1a(19) =10a(20) =21a(21) =22a(22) =1a(23) =12a(24) =5a(25) =26a(26) =3a(27) =14a(28) =1a(29) =60