720916

Appears in sequences

• Number of ways to color vertices of an octagon using <= n colors, allowing only rotations.at n=7A054622
• Number of n-bead necklaces with 7 colors.at n=8A054626
• Triangle 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=34A054631
• Table read by antidiagonals: T(n,k) = number of distinct n X k toroidal 0..6 arrays.at n=28A184331
• Number of n-bead necklaces of n colors not allowing reversal, with no adjacent beads having the same color.at n=7A208533