400600domain: NAppears in sequencesG.f.: A(x) = Product_{n>=0} (1+a(n)*x^(n+1))^2 = Sum_{n>=0} a(n)*x^n.at n=10A093635Number of Schroeder paths of semilength n in which there are no (2,0)-steps at level 1.at n=10A224071