43046889

Appears in sequences

• Number of ways to color vertices of a 9-gon using <= n colors, allowing only rotations.at n=9A054623
• Number of n-bead necklaces with 9 colors.at n=9A054628
• T(n,k) = Sum_{d|k} phi(d)*n^(k/d)/k, triangle read by rows, T(n,k) for n >= 1 and 1 <= k <= n.at n=44A054630
• 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=44A054631
• Number of equivalence classes of n-valued Post functions of 1 variable under action of complementing group C(1,n).at n=8A056665
• a(n) = Sum_{d|n} phi(n/d) * (-n)^(d-1).at n=8A382998