법칙 찾기 3, 6, 11, (), 27, (), 51

법칙 찾기 3, 6, 11, (), 27, (), 51

18, 38
3 + 3 = 6
6 + 5 = 11
11 + 7 = 18
18 + 9 = 27
27 + 11 = 38
38 + 13 = 51