Modified Bessel Function I0 x actual bessi0(x) 0.00 1.0000000 1.0000000 0.20 1.0100250 1.0100250 0.40 1.0404018 1.0404018 0.60 1.0920453 1.0920453 0.80 1.1665149 1.1665149 1.00 1.2660658 1.2660658 1.20 1.3937256 1.3937256 1.40 1.5533952 1.5533950 1.60 1.7499807 1.7499807 1.80 1.9895593 1.9895593 2.00 2.2795851 2.2795854 2.50 3.2898390 3.2898393 3.00 4.8807926 4.8807926 3.50 7.3782034 7.3782034 4.00 11.3019218 11.3019218 4.50 17.4811726 17.4811726 5.00 27.2398701 27.2398720 6.00 67.2344055 67.2344055 8.00 427.5641174 427.5641174 10.00 2815.7167969 2815.7165527