17889032domain: NAppears in sequencesLinear recursion with Catalan numbers.at n=12A053369a(n) = C(n)*b(n), where C(n) is the n-th Catalan number and b(n) is the probability p_n(x<y) closest to 1/2 with x,y taken from the Catalan poset P_n.at n=14A335213