Re: Rule 3: Functions should be curried.
seq_7_10_13_16_19 = map(partial(int.__add__, 4), range(3,18,3))
Much too ugly*:
seq_7_10_13_16_19 = [ val + 4 for val in range(3,18,3) ]
* but you are obviously illustrating the FP aspect of it... list comprehensions are about as functional as I like to go ;)