start by identifying a pattern into the sequence
from the first number to the second number we can see that we add 6.
now from the second number to the third number we add 7
this meand that from third to forth 8 will be added and to find the next number in the sequence we must add 9.
![26+9=35](https://img.qammunity.org/2023/formulas/mathematics/college/2q5ngm9yel6c3bifwqnlhhoeyuy1lkd3so.png)
the following number in the sequence will be 35.