262131251domain: NAppears in sequencesSquare array A(n,k), n>=0, k>=0, read by antidiagonals: A(n,k) = sum of the k-th powers of multinomials M(n; mu), where mu ranges over all compositions of n.at n=50A326322a(0) = 1; a(n) = Sum_{k=0..n-1} binomial(n,k)^4 * a(k).at n=5A336196