11654465domain: NAppears in sequencesNumber of nonequivalent dissections of an (n+2)-gon by nonintersecting diagonals up to rotation and reflection.at n=14A001004Let f(n, m) = binomial(n - m/2 + 1, n - m + 1) - binomial(n - m/2, n - m + 1) and let s(n) = Sum_{k=0..n} f(n, k); then a(n) = numerator of s(n).at n=10A072287