21552969

Appears in sequences

• Number of ways to color vertices of a 9-gon using <= n colors, allowing rotations and reflections.at n=9A060561
• Triangle T(n,k) read by rows, giving number of bracelets (turnover necklaces) with n beads of k colors (n >= 1, 1 <= k <= n).at n=44A081720
• Number of bracelets of n beads in up to n colors.at n=8A081721