140610domain: NAppears in sequencesNumber of primitive (aperiodic) reversible strings with n beads using a maximum of six different colors.at n=6A056317a(n) = 225*n^2 - 15.at n=24A158559Integers expressible as x^3 + 2*y^3 (x, y > 0) in two ways.at n=28A219725