Partial sums of A001037, the number of degree-n irreducible polynomials over GF(2).

Terms

a(0) =1a(1) =3a(2) =4a(3) =6a(4) =9a(5) =15a(6) =24a(7) =42a(8) =72a(9) =128a(10) =227a(11) =413a(12) =748a(13) =1378a(14) =2539a(15) =4721a(16) =8801a(17) =16511a(18) =31043a(19) =58637a(20) =111014a(21) =210872a(22) =401429a(23) =766151a(24) =1465021a(25) =2807197a(26) =5387992a(27) =10359000a(28) =19945395a(29) =38458185