title: Number Triangles N Moves 1
signature: number_triangles_n_moves_1 <- function(n) {
test_code: 
  
  
  # SOLUTION CODE
  # ============================================
  PLACEHOLDER_CODE_BODY
  
  # TESTING CODE 
  # ============================================
  validate_solution <- function(actual, expected) {
      toString(actual)==toString(expected)
  }
  
  driver <- function(n, expected){
      if (validate_solution(PLACEHOLDER_FN_NAME(n), expected)){
          "PASSED"
      } else{
          "FAILED"
      }
  }
  
  main <- function() {
      cat(sprintf("TEST-0...%s\n",driver(
          16L, 
          86093441L
      )))
  
  }
  
  main()
source_py: def number_triangles_n_moves_1(n):
      ans = ((2 * pow(3, n)) - 1)
      return ans
source_cpp: int number_triangles_n_moves_1(int n) {
    int ans = 2 * ( pow ( 3, n ) ) - 1;
    return ans;
  }