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    eoht31415's Avatar
    eoht31415 Posts: 1, Reputation: 1
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    #1

    Dec 15, 2017, 06:44 AM
    1,5,23,85,271 nth sequence
    What is the nth sequence?
    joypulv's Avatar
    joypulv Posts: 21,593, Reputation: 2941
    current pert
     
    #2

    Dec 15, 2017, 07:00 AM
    Hi! We help with homework; we don't do it for you. With pi in your ID, I'm sure you can start. Let us know.

    (PS- I spent about 3 minutes on it and didn't get it.)
    ma0641's Avatar
    ma0641 Posts: 15,681, Reputation: 1012
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    #3

    Dec 19, 2017, 09:31 PM
    Not a Fibonacci sequence. I tried a few other Nth sequences but no answer.
    ebaines's Avatar
    ebaines Posts: 12,129, Reputation: 1307
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    #4

    Jan 5, 2018, 02:49 PM
    Could it be that the last number given should be 221 rather than 271? Just a guess...
    CWH68's Avatar
    CWH68 Posts: 26, Reputation: 2
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    #5

    Feb 13, 2018, 02:48 PM
    There is a unique 4th degree polynomial P such that P(1) = 1, P(2) = 5, and P(n) would be the nth term of the sequence. Maybe that's it.

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