Number of binary polynomials of degree n irreducible over the integers.

Terms

a(0) =2a(1) =2a(2) =2a(3) =6a(4) =8a(5) =21a(6) =34a(7) =84a(8) =150a(9) =331a(10) =614a(11) =1417a(12) =2638a(13) =5508a(14) =10874a(15) =23437a(16) =44862a(17) =95887a(18) =185238a(19) =390297a(20) =765510a(21) =1557427a(22) =3043918a(23) =6525948a(24) =12706892a(25) =25836122a(26) =51135384a(27) =105070336a(28) =206266718a(29) =426254492