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increment python python-3.x range

How to create a list of a range with incremental step?

I know that it is possible to create a list of a range of numbers:

list(range(0,20,1))
output: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]

but what I want to do is to increment the step on each iteration:

list(range(0,20,1+incremental value)

p.e. when incremental = +1

expected output: [0, 1, 3, 6, 10, 15]  

Is this possible in python?

This is possible, but not with range:

def range_inc(start, stop, step, inc):
i = start
while i < stop:
yield i
i += step
step += inc