Escape Game in spaceship

Escape game in the spaceship

Communication Room

The refectory

Showers

Botanical labotary

Control Room

What is the code ?

Well Done

Henry, the ship's cook, is a big fan of mathematics. He meticulously weighs each ingredient and the presentation of the meals he offers us always includes geometric figures. He even makes his own dishes, following mathematical rules. Here is one them, the ''coscos'' that he uses to serve us couscous.2^(b+4)=a Find b

Symboles : A B C D E F G H INombres : 3 8 18 38 78 158 ?

Find I

P.S: the unit of this number will be the missing number for the code