Find the rule 3, 6, 27, find the fourth number It's a double-digit number

(1) 3 = 1 + 2 is the square of 1 plus 2; 6 = 4 + 2 is the square of 2 plus 2; 27 is the square of 5 plus 2. (2) now we need to analyze the law of 1,2,5, and what should be the following? 1 is the square of 0 plus 1, 2 is the square of 1 plus 1, 5 is the square of 2 plus 1, so the next number should be the square of 3 plus 1, which is 10