In this sequence there are actually two sequences. 1 sequence for the numbers in odd positions (1,3,5 enz) and one sequence for the numbers in the even positions (2,4,6 enz.) The following applies to the numbers in the odd positions:

You can find the second number in the sequence by applying the following transformation to the first number: +6 You find the third number in the sequence by applying the following transformation to the second number: +9 You can see that this is not the same number. Every step the number in the transformation changes with +3

VThe following applies to the numbers in the even positions:

In this sequence you find the next number by multiplying the previous number with itself. You find the second number in the sequence by multiplying the first number with itself: 2 * 2 = 4 You find the third number by multiplying the second number with itself: 4 * 4 = 16 etc.