Square root of 0,3, square root of 6, square root of 3,12, square root of 15, square root of 18, find the law What's the tenth number?

Square root of 0,3, square root of 6, square root of 3,12, square root of 15, square root of 18, find the law What's the tenth number?

0, √ 3, √ 6, 3, 2 √ 3, √ 15, 3 √ 2, that is, the respective root of 0, 3, 6, 9, 12, 15, 18, √ (3 * n) n = 0, 1 The tenth number 3 √ 3 or √ 27