Question: 
Write a python function to find sum of even index binomial coefficients.


Model's Code:
def even_binomial_Coeff_Sum(n):
    return 2**(n-1) if n > 0 else 0



Sample Correct Code:
import math  
def even_binomial_Coeff_Sum( n): 
    return (1 << (n - 1)) 


Asserts:
assert even_binomial_Coeff_Sum(4) == 8
assert even_binomial_Coeff_Sum(6) == 32
assert even_binomial_Coeff_Sum(2) == 2


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 274 of 974: 198/274 (72.26277372262774%): success