Observe the number of columns given below: 0,6, - 6,18, - 30,66 Then the tenth number is_____________ . Find the law of this group of numbers

Observe the number of columns given below: 0,6, - 6,18, - 30,66 Then the tenth number is_____________ . Find the law of this group of numbers

The observation shows that the sum of the third number and the second number is twice of the first number (0 is double or 0). You can use this rule to deduce that the tenth number is 1026 one by one. If you use the sequence to deduce, let the original sequence be an. According to the rule (an + 1) + an = 2 (an-1), add an on both sides to get (an + 1) + 2 (an) = (a