Q: What is the next in the series 1 11 21 1211 111221 312211?

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1113213211

1311221

312211

1(one 1) 11(two ones) 21(one two and 1 1 ) and so on so 1 11 21 1211 111221 312211 13112221 1113213211

111221

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1113213211

1311221

312211

312211 13112221

1113213211

The next number in this sequence is 13112221.

1(one 1) 11(two ones) 21(one two and 1 1 ) and so on so 1 11 21 1211 111221 312211 13112221 1113213211

331131211131221

Is the fourth term correct? Should it not be 111221? Then the next term would be 13112221

111221

Next in sequence is 13112221.This series describes each number that came before it:1 [One]11 [One One]21 [Two One(s)]1211 [One Two and One One(s)]111221 [One One, One Two, and Two One(s)]312211 [Three One(s), Two Two(s), and One One]The next number in the series is:13112221 [One Three, One One, Two Two(s), Two One(s)]

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