Question 1164340
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For such problems, the question


            "Find at least one correct formula for the sequence"


is mathematically correct.




The question "Find the 6-th term" is mathematically NONSENSE.


With such questions, you should go to future-tellers.



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I see some post telling about simplest and most evident formula . . . 


Sorry, the original post said NOTHING about it, so your comment is IRRELEVANT.


Also, these arguments lie out of Math.



The FACT is that there are infinitely many formulas, and &nbsp;EVEN &nbsp;INFINITELY &nbsp;MANY &nbsp;<U>POLYNOMIAL</U> &nbsp;formulas
producing given starting values and infinitely many different following terms . . . 



So, in this form, the problem DOES NOT RELATE to Math.


It is typical &nbsp;PUZZLE&nbsp; question, &nbsp;with no relation to Math.



Relevant &nbsp;Math problem are formulated &nbsp;<U>differently</U> . . .