8217720

Appears in sequences

• Number of reversible strings with n beads using exactly six different colors.at n=9A056313
• Number of primitive (aperiodic) reversible strings with n beads using exactly six different colors.at n=9A056322
• Triangle read by rows: T(n,k) is the number of rows of n colors with exactly k different colors counting chiral pairs as equivalent, i.e., the rows are reversible.at n=50A305621
• Triangle read by rows: T(n,k) is the number of chiral pairs of rows of n colors with exactly k different colors.at n=50A305622
• Number of chiral pairs of rows of n colors with exactly 6 different colors.at n=9A305626