2=2*4-6
10=2*2+6
14=2* 10-6
34= 14*2+6
62=2*34-6
130=2*62+6
254=2* 130-6
The absolute values of pairwise numerical differences are: 6, 12, 24, 48 and 96 respectively.
So we can push back192,384.
The seventh number is-130, and the eighth number is 254.
Extended data:
Recursive series classification
According to whether the number of terms is limited, it can be divided into finite series and infinite series.
1 and a series with a limited number of items is a "finite series".
2. A sequence with infinite terms is an infinite sequence.
Some special sequences
1, a series with periodic changes is called a periodic series (such as trigonometric function);
2. A series with equal terms is called a constant series. (Note that constant series is a special case of increasing series and decreasing series. )
Baidu Encyclopedia-Recursive Series (Series Name)