93360

Appears in sequences

• Number of reversible strings with n beads using exactly four different colors.at n=8A056311
• Number of primitive (aperiodic) reversible strings with n beads using exactly four different colors.at n=8A056320
• a(n) = n*(n+1)*(7*n^2 - n - 4)/4.at n=15A172077
• 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=39A305621