



 
Bharat,
The first term is 5. Starting with the second term, what is the first digit of each successive term? What should be the first digit of the fifth term? Penny
I don't know. (The improper use of the equals sign here doesn't make it any easier.) I don't see any pattern simpler than continuing 54325, 654325, etc, though it's a bit arbitrary & what the 10th term is to be is unclear. The fourth term is not an integer multiple of the third, breaking one obvious pattern. Prime factorizations are 5, 5*5, 5*5*13, 5*5*173. I do note that Good Hunting!  


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