Question

1, 3, 7, 15, 31, .
What is the pattern

Answer 1

The pattern is y=2x+1 you multiply each number by 2 and add one.
Explanation
2(1)+1= 3
2(3)+1=7
2(7)+1=15
2(15)+1=31

Answer 2

Step-by-step explanation: Your adding 2. So 1 + 2= 3, 3 + 4 =7, 7 + 8=15, 15 + 16=31. You see my point. My wording is off.