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

    May 3, 2009, 01:22 PM
    1,11,21,1211,111221,312211.What is next & why?
    What is this sequence?
    tickle's Avatar
    tickle Posts: 23,796, Reputation: 2674
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    #2

    May 3, 2009, 01:38 PM

    Why do you want to know ? Is it because you have a lot of time on you hands and needed to ask a question about number sequencing ?


    Curious tick
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #3

    May 4, 2009, 11:06 AM

    A pretty big number:

    13112221

    A classic sequence, though one that has nothing to do with mathematics. Here's a hint - each entry in the sequence is a description of what came before.
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #4

    May 4, 2009, 01:31 PM
    See here. You could try this site anytime you have a sequence. It doesn't have all them, though.

    1,11,21,1211,111221,312211 - OEIS Search Results
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