173593

Appears in sequences

• Number of necklaces with 9 black beads and n-9 white beads.at n=18A032194
• a(n) = (1/(3*n))*Sum_{d|n, d even} phi(2*n/d)*binomial(3d/2,d).at n=9A082936
• Number of distinct convex equilateral n-gons having rotational symmetry and with corner angles of m*Pi/n (0 < m <= n).at n=24A292355
• A(n,k) is (1/k) times the number of n-member subsets of [k*n] whose elements sum to a multiple of n; square array A(n,k), n>=1, k>=1, read by antidiagonals.at n=63A309148
• (1/3) times the number of n-member subsets of [3n] whose elements sum to a multiple of n.at n=8A309182