title: Find Sum Even Index Binomial Coefficients 1
signature: function findSumEvenIndexBinomialCoefficients1($n) {
test_code: <?php
  
  
  // SOLUTION CODE 
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  function validateSolution($actual, $expected){
      return serialize($actual) == serialize($expected);
  }
  
  function driver($n, $expected){
      try{
        if (validateSolution(PLACEHOLDER_FN_NAME($n), $expected)){
          return "PASSED";
        }
        return "FAILED";
      }
      catch (Exception $exception_obj) {
        return get_class($exception_obj);
      }
  }
  
  function main(){
      printf("TEST-0...%s\n",driver(
        56, 
        36028797018963968));
      
      printf("TEST-1...%s\n",driver(
        28, 
        134217728));
      
      printf("TEST-2...%s\n",driver(
        4, 
        8));
      
      printf("TEST-3...%s\n",driver(
        24, 
        8388608));
      
      printf("TEST-4...%s\n",driver(
        30, 
        536870912));
      
      printf("TEST-5...%s\n",driver(
        48, 
        140737488355328));
      
      printf("TEST-6...%s\n",driver(
        32, 
        2147483648));
      
      printf("TEST-7...%s\n",driver(
        13, 
        4096));
      
      printf("TEST-8...%s\n",driver(
        19, 
        262144));
      
  }
  
  main();
  ?>
source_py: def find_sum_even_index_binomial_coefficients_1(n):
      return (1 << (n - 1))
source_cpp: int find_sum_even_index_binomial_coefficients_1(int n) {
    return ( 1 << ( n - 1 ) );
  }