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-   -   1,5,23,85,271 nth sequence (https://www.askmehelpdesk.com/showthread.php?t=836094)

  • Dec 15, 2017, 06:44 AM
    eoht31415
    1,5,23,85,271 nth sequence
    What is the nth sequence?
  • Dec 15, 2017, 07:00 AM
    joypulv
    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.)
  • Dec 19, 2017, 09:31 PM
    ma0641
    Not a Fibonacci sequence. I tried a few other Nth sequences but no answer.
  • Jan 5, 2018, 02:49 PM
    ebaines
    Could it be that the last number given should be 221 rather than 271? Just a guess...
  • Feb 13, 2018, 02:48 PM
    CWH68
    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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