908160

Appears in sequences

• Number of distinct classes of permutations of length n under reversal, rotation and complement to n+1.at n=10A089066
• Number of tone-rows in n-tone music.at n=8A099030
• Number of trivial c-Wilf equivalence classes in the symmetric group S_n.at n=10A262480
• Number of inequivalent placements of n nonattacking rooks on n X n board up to rotations of the board.at n=9A263685
• Unitary deficient-perfect numbers: unitary deficient numbers k such that 2*k-usigma(k) is a unitary divisor of k, where usigma is the sum of unitary divisors of k (A034448).at n=11A303356