156115domain: NAppears in sequencesNumber of cycles in all partial functions on {1,2,...,n}.at n=6A216534Floor(6^n/(1+1/(2*cos(5*Pi/11)))^n).at n=42A240840a(n) = Sum_{k=0..n} k^3 * binomial(n-k, k).at n=16A277361Expansion of g.f. A(x) satisfying A(x) = 1 + x*A(x)/(1 - 3*x*A(x))^2.at n=7A365773