Number of coloured 0 's in an N | Function to return the count of coloured 0 s in an n - level hexagon ; Driver code
def count ( n ) : NEW_LINE INDENT return n * ( 3 * n - 1 ) // 2 ; NEW_LINE DEDENT if __name__ == " _ _ main _ _ " : NEW_LINE INDENT n = 3 ; NEW_LINE print ( count ( n ) ) ; NEW_LINE DEDENT