plot (1 + -4.1802327176423804e-001 (r/6.5746697944293521e+002)^2 + 5.0715244063187526e-001 (r/6.5746697944293521e+002)^4 + -5.7843597214487474e-001*(r/6.5746697944293521e+002)^6) for r from 0 to 400