The sequence is 6, 14, 22, 30, 38, 46.
As you can observe, the sequence is increasing by a difference of 8 because 6+8=14, 14+8=22, 22+8=30, and so on. We have to use the arithmetic sequence formula

Where a1 = 6 and d = 8.

Hence, the correct sequence is an = 8n-2.