70361domain: NAppears in sequencesNumber of points in N^4 of norm <= n.at n=21A055403Rectangular table, read by antidiagonals, where the g.f. of row n is Sum_{i>=0} F_i(x)^n / 2^(i+1), where F_0(x)=x, F_{n+1}(x) = F_n(x+x^2), for n>=1.at n=42A122941