Number of irreducible binary polynomials Sum_{j=0..n} c(j)*x^j with c(1)=c(n-1)=1.

Terms

a(0) =1a(1) =1a(2) =0a(3) =1a(4) =2a(5) =2a(6) =4a(7) =9a(8) =14a(9) =24a(10) =48a(11) =86a(12) =154a(13) =294a(14) =550a(15) =1017a(16) =1926a(17) =3654a(18) =6888a(19) =13092a(20) =24998a(21) =47658a(22) =91124a(23) =174822a(24) =335588a(25) =645120a(26) =1242822a(27) =2396970a(28) =4627850a(29) =8947756