Dice Combinations

def canSum(targetSum, numbers=[1,2,3,4,5,6], memo=None):
    if memo is None:
        memo = {}
    if targetSum in memo:
        return memo[targetSum]
    if targetSum == 0:
        return 1
    if targetSum < 0:
        return 0

    total_ways = 0
    for number in numbers:
        total_ways += canSum(targetSum - number, numbers, memo)

    memo[targetSum] = total_ways
    return total_ways

def main():
    n = int(input())
    print(canSum(n))

if __name__ == "__main__":
    main()

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: WRONG ANSWER

Test 12

Verdict: WRONG ANSWER

Test 13

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 23, in <module>
    main()...

Test 14

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 23, in <module>
    main()...

Test 15

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 23, in <module>
    main()...

Test 16

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 23, in <module>
    main()...

Test 17

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 23, in <module>
    main()...

Test 18

Verdict: WRONG ANSWER

Test 19

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 23, in <module>
    main()...

Test 20

Verdict: WRONG ANSWER