#!/usr/bin/env python3

def pythonsum(n):
    a = [*range(n)]    
    b = [*range(n)]
    c = []
    for i in range(len(a)):
        a[i] = i ** 2
        b[i] = i ** 3
        c.append(a[i] + b[i])        
    return c

print(pythonsum(3)) # [0, 2, 12]