from sys import stdin
def mult_3_or_5(n: int) -> bool:
if n % 3 == 0:
return True
elif n % 5 == 0:
return True
else:
return False
test_cases = int(stdin.readline())
for i in range(0, test_cases):
print(sum(n for n in range(3, int(stdin.readline())) if mult_3_or_5(n) == True))
i += 1