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Problems > Brain Food > 2008

A Mysterious Sequence

Can you figure out the next number in this sequence?

1, 11, 21, 1211, 111221, ???


Congratulations to the following, who were high scorers for this past year:
AlphaSigChainsaw (96 points)
yoi55 (85 points)
lewanj (83 points)
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View the solution
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