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:

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: -5 * -5 = 25 You find the third number by multiplying the second number with itself: 25 * 25 = 625 etc.

VThe following applies to the numbers in the even positions:

In this sequence you find the next number by applying the following transformation: /2