SOLUTION: What will be the next number of the following series: 1,1,2,4,6,18,21,?

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Question 884465: What will be the next number of the following series: 1,1,2,4,6,18,21,?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
1 0 1 0 -1 12 -52
1 1 1 -1 11 -40 -52
2 2 0 10 -29 -92
4 2 10 -19 -121
6 12 -9 -140
18 3 -149
21 -146
-125
8th term could be -125