6710880domain: NAppears in sequencesNumber of monic irreducible polynomials of degree 5 in GF(2^n)[x].at n=4A115491a(n) = (1/n)*Sum_{d|n} moebius(d)*2^(n^2/d).at n=4A168649Number of 5-bead necklaces of n colors not allowing reversal, with no adjacent beads having the same color.at n=32A208536