328920

Appears in sequences

• Coefficients of ménage hit polynomials.at n=6A000181
• Triangle read by rows: T(n,k) = number of ways of seating n couples around a circular table so that exactly k married couples are adjacent (0 <= k <= n).at n=59A094314
• Triangle T(n, k) = coefficients of p(n,x), where p(n,x) = Sum_{j=0..n} (2*n*(n-j)!/(2*n-j)) * binomial(2*n-j, j) * (x-1)^j and p(0,x) = 1, read by rows.at n=59A156996
• A(x) satisfies A005408(x) = A(x)/A(x^2), A005408 = odd numbers.at n=37A173283