387456domain: NAppears in sequencesTriangle read by rows of numbers of paths in a lattice satisfying certain conditions.at n=51A071949Triangle, read by rows, T(n,k)=k/n*Sum_{i=0..n-k} C(2*n,n-k-i)*C(2*n+i-1,i).at n=29A257532G.f. A(x) satisfies: A(x) = 1 + x + x^2 + x^3 * A(x)^3.at n=19A346733