2690844domain: NAppears in sequencesNumber of n-bead necklaces with 3 colors.at n=16A001867Number of necklaces with n beads of 4 colors, no 2 adjacent beads the same color.at n=15A106366Number of periodic necklaces with n beads of 3 colors.at n=32A278663Inverse Weigh transform of 3^n.at n=15A306157