Prints iterates of the Hénon map (M. Hénon, Commun. Math. Phys. 50, 69, (1976)) to stdout:
-l number of points x,y (l=0: infinite)
-A parameter a (1.4)
-B parameter b (0.3)
-X initial x
-Y initial y
-x number of transients discarded (10000)
-o output file name, just -o means henon.dat
-V verbosity level (0 = only fatal errors)
-h show this message
x(n+1) = 1- a*x(n)^2 + b*y(n) y(n+1) = x(n)