Fibonacci Function

[carson-evans]

python3 fibonacci.py 15 ✘ '1307674368000' != '610'

• 1307674368000
• 610

python3 fibonacci.py 20 ✘ '2432902008176640000' != '6765'

• 2432902008176640000
• 6765

python3 fibonacci.py 25 ✘ '15511210043330985984000000' != '75025'

• 15511210043330985984000000
• 75025

python3 fibonacci.py 30 ✘ '265252859812191058636308480000000' != '832040'

• 265252859812191058636308480000000
• 832040