SOLUTION: Find a recursive rule for the sequence 1, 4, 9, 22,

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Question 823918: Find a recursive rule for the sequence 1, 4, 9, 22,
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
Notice the pattern:
2*4+1=9
2*9+4=22
so a reasonable possibility is:

x%5Bn%5D=2x%5Bn-1%5D%2Bx%5Bn-2%5D, n%3E=2