How many more primes than irreducible GF(2)[X] polynomials there are in range [2^n,2^(n+1)].

Terms

a(0) =0a(1) =0a(2) =1a(3) =0a(4) =2a(5) =1a(6) =4a(7) =5a(8) =13a(9) =19a(10) =38a(11) =69a(12) =129a(13) =242a(14) =451a(15) =848a(16) =1629a(17) =3039a(18) =5858a(19) =11041a(20) =21209a(21) =40478a(22) =77659a(23) =148986a(24) =286948a(25) =551944a(26) =1064949a(27) =2056282a(28) =3975512a(29) =7694488