What is the missing number in the sequence? 1, 1, 2, 3, 5, 8, ?

What is the missing number in the sequence? 1, 1, 2, 3, 5, 8, ?

Explanation

What is the missing number in the sequence? 1, 1, 2, 3, 5, 8, ?

1 + 1 = 2

1+2 = 3

2+3 = 5

8+5=13