3697909056domain: NAppears in sequencesNumber of primitive polynomials of degree n over GF(2) (version 2).at n=36A000020Number of primitive polynomials of degree n over GF(2).at n=36A011260a(n) = phi(2^prime(n) - 1)/prime(n); a(0) = 0 by convention.at n=12A056743