64566684domain: NAppears in sequencesNumber of primitive (aperiodic) word structures of length n using a 3-ary alphabet.at n=17A056274Number of primitive (aperiodic) palindromic structures using a maximum of three different symbols.at n=36A056477Number of Lyndon words (aperiodic necklaces) with 6 beads of n colors.at n=26A292350