233725domain: NAppears in sequencesa(n) = floor(n*phi^19), where phi is the golden ratio, A001622.at n=25A004934a(n) = round(n*phi^19), where phi is the golden ratio, A001622.at n=25A004954Numbers n such that the decimal expansions of both n and n^2 have 2 as smallest digit and 7 as largest digit.at n=36A257123