Which of the following is an arithmetic sequence?
10,20,30,4010, 20, 30, 4010,20,30,40
1,2,4,71, 2, 4, 71,2,4,7
1,−1,1,−11, -1, 1, -11,−1,1,−1
2,4,8,162, 4, 8, 162,4,8,16