153240domain: NAppears in sequencesNumber of edges in an diagonal-edged (or diamond-shaped) checkerboard with width and height 2*n-1 (see Comments in A333434 for definition).at n=6A333460G.f. satisfies A(x) = (1 + x*A(x)/(1 - x*A(x))^3)^3.at n=6A365136