title: Sum Subsets Set Formed First N Natural Numbers
signature: function sum_subsets_set_formed_first_n_natural_numbers(n)
source_py: def sum_subsets_set_formed_first_n_natural_numbers(n):
      return (((n * (n + 1)) / 2) * (1 << (n - 1)))
source_cpp: unsigned long long sum_subsets_set_formed_first_n_natural_numbers(int n) {
    return ( n * ( n + 1 ) / 2 ) * ( 1 << ( n - 1 ) );
  }