My first conundrum
Level
pending
What is the next number in the sequence:
1, 3, 9, 13, 65, 71, 497, 505, 4545, 4555, ???
The answer is 50105.
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1 solution
1+2=3
3*3=9
9+4=13
13×5=65
65+6=71
........
4555×11=50105