39268272420domain: NAppears in sequencesBase-4 digits are, in order, the first n terms of the periodic sequence with initial period 2, 1, 0.at n=17A037521a(n) = (8^n - 1)*4/7.at n=12A108019Number of monic irreducible polynomials of degree n over GF(8) that have a given nonzero trace.at n=13A300674