python list comprehension to produce two values in one iteration

Question

I want to generate a list in python as follows -

[1, 1, 2, 4, 3, 9, 4, 16, 5, 25 .....]

You would have figured out, it is nothing but n,

Answer 1

lst_gen = sum([(i, i*i) for i in range(1, 10)],())

oh I should mention the sum probably breaks the one iteration rule :(