English: The fractal of Henon attractor, which is generated by the above equation with the parameters a = 1.4, b = 0.3. The number of iteration is fig.(1) n = 10000, fig.(2) n = 100000, fig.(3) n = 1000000, fig.(4) n = 1000000. The initial values are y1 = 0 and x1 = 0.7.