1119796domain: NAppears in sequencesNumber of ways to color vertices of a 9-gon using <= n colors, allowing only rotations.at n=6A054623Number of n-bead necklaces with 6 colors.at n=9A054625Triangle read by rows: row n (n >= 1) contains the numbers T(n,k) = Sum_{d|n} phi(d)*k^(n/d)/n, for k=1..n.at n=41A054631