Number of conjugacy classes of primitive elements in GF(2^n) which have trace 0.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =3a(5) =2a(6) =9a(7) =9a(8) =23a(9) =29a(10) =89a(11) =72a(12) =315a(13) =375a(14) =899a(15) =1031a(16) =3855a(17) =3886a(18) =13797a(19) =12000a(20) =42328a(21) =59989a(22) =178529a(23) =138256a(24) =647969a(25) =859841a(26) =2101143a(27) =2370917a(28) =9204061a(29) =8911060