Sometimes you need to enter a number that is not naturally incremented (such as the equal-ratio sequence: 2, 4, 8 ...), we can use the right to drag the method to complete:
1. Enter the first two values (2, 4) of the sequence in cell 1th and 22 first;
2. Select the above two cells and move the mouse to the lower right corner of the 2nd cell to form a fine cross line. Press and hold the right button to drag backward (or downward) to the last cell of the sequence, loosen the right button, a menu pops up, select the "equal-ratio sequence" option, then the sequence (2, 4, 8, 16 ...) and its cell format into the appropriate cells (if you select the "Linear series", enter 2, 4, 6, 8 ...).