126406domain: NAppears in sequencesNumber of triples (p,q,r) of partitions such that p is a partition of n and r <= q <= p (by diagram containment).at n=13A305023G.f. A(x) satisfies: A(x) = x + x^2 + x^3 + x^4 * (1 + A(A(x))).at n=17A308031