Answer:
any three consecutive integers: -5, -4, -3; or 100, 101, 102, for example
Step-by-step explanation:
If x represents the middle integer, then the first is x-1 and the third is x+1. The sum of these two is (x-1) +(x+1) = 2x, which is double the middle integer.
The desired relation is true for any three consecutive integers.
Example:
53, 54, 55 ⇒ 2(54) = 108 = 53 +55
