In the following question, select the missing number from the given series

1, 1, 3, 4, 5, 9, 7, 16, 9, 25, 11, ?

There are two alternating series : (i) 1 + 2 = 3 3 + 2 = 5 5 + 2 = 7 7 + 2 = 9 9 + 2 = 11 (ii) (1)² = 1 (2)² = 4 (3)² = 9 (4)² = 16 (5)² = 25