1158752domain: NAppears in sequencesExpansion of (1 - x)/(1 - 2*x - 2*x^2 + 2*x^3).at n=16A052528Number 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=10A333460