2357947701domain: NAppears in sequencesNumber of necklaces of n beads with up to n colors, with cyclic permutation {1,..,n} of the colors taken to be equivalent.at n=10A130293a(n) = Sum_{k=1..n} gcd(k,n)^(k-2).at n=10A341036a(n) = Sum_{k=1..n} gcd(k,n)^(n-2).at n=10A342432a(n) = Sum_{k=1..n} gcd(k,n)^(gcd(k,n) - 2).at n=10A342435