static int p6 ( int n ) {
  return p3 ( n ) * 6 - n * 6 + 1 ;
}

static int p6 ( int n ) { return p3 ( n ) * 6 - n * 6 + 1 ; }
(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: (binary_expression left: (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (identifier))) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal)))))