324768domain: NAppears in sequencesExpansion of (1+4*x+8*x^2-x^3)/((1-x)*(1+x)*(1-3*x^2)).at n=21A224785Maximal sum of x0 + x0*x1 + ... + x0*x1*...*xk over all compositions x0 + ... + xk = n.at n=33A239288