Consecutive integers are numbers that are right next to each other on the number line with no whole numbers in between them. For example:
7, 8, 9, 10 are consecutive integers
3, 5, 8, 11 are not
So you need to find a sequence of consecutive integers where the second number multiplied by two is equal to the forth.
Spoiler Alert:
There is one one sequence that comes to mind. "1, 2, 3, 4", As 2 is the second number, 2×2 = 4, and four is the forth number in the sequence.