static int numberSequence ( int n ) {
  if ( n == 1 ) return 1 ;
  String s = "" ;
  for ( int i = 1 ;
  i < n ;
  i ++ ) s += '1' ;
  s += '0' ;
  for ( int i = 1 ;
  i <= n ;
  i ++ ) s += '1' ;
  int num = binaryToDecimal ( s ) ;
  return num ;
}

static int numberSequence ( int n ) { if ( n == 1 ) return 1 ; String s = " " ; for ( int i = 1 ; i < n ; i ++ ) s += '1' ; s += '0' ; for ( int i = 1 ; i <= n ; i ++ ) s += '1' ; int num = binaryToDecimal ( s ) ; return num ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (return_statement (decimal_integer_literal))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (string_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (expression_statement (assignment_expression left: (identifier) right: (character_literal)))) (expression_statement (assignment_expression left: (identifier) right: (character_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (expression_statement (assignment_expression left: (identifier) right: (character_literal)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list (identifier))))) (return_statement (identifier))))