905216domain: NAppears in sequencesExpansion of g.f. c(2*x)^4, where c(x) is the g.f. of A000108.at n=7A101596Riordan array (c(2x)^2,xc(2x)), c(x) the g.f. of A000108.at n=47A167432Triangle read by rows, T(n,k) for 0<=k<=n, generalizes the Motzkin lattice paths with weights of A003645.at n=37A201639