536.sagews

phi = 1.61803399

def fib(n):
     return round( (phi**n) / sqrt(5) )

plots = { "fib" : plot(lambda n : fib(n), 0, 13, thickness=5, rgbcolor=(0.5,1,0.5))
        , "sqr" : plot(lambda n : n**2, 0, 13, thickness=5, rgbcolor=(0.5,0.5,1)) }
        
plots["fib"] + plots["sqr"]