[1,11,21,111,121,211,221,321,1111,1121,1211,1221, 1321,2111,2121,2211,2221,2321,3211,3221,3321,4321, 11111,11121,11211,11221,11321,12111,12121,12211, 12221,12321,13211,13221,13321,14321,21111,21121, 21211]