static long centeredTridecagonalNum ( long n ) {
  return ( 13 * n * ( n - 1 ) + 2 ) / 2 ;
}

static long centeredTridecagonalNum ( long n ) { return ( 13 * n * ( n - 1 ) + 2 ) / 2 ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (return_statement (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (decimal_integer_literal) right: (identifier)) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (decimal_integer_literal))) right: (decimal_integer_literal)))))