As can be seen from the first two groups, the power of n will have n arrows, and the interval between numbers is 2.

So the power of 4 has four sets of arrows,

Discovery 4? =64 64÷4= 16

So the average of the middle two numbers is 16, that is, 15 and 17.

So the others are 13, 15, 17, 19.

This is my conclusion after meditation.

If I can help you, I hope you will give me an adoption without hesitation ~ (satisfactory answer)

If not, just ask, and I'll try my best to help you solve it ~

It's not easy to answer questions, please forgive me if you are dissatisfied and willing ~