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Best Answer

13112221

1 time 3, 1 time 1, 2 times 2, 2 times 1.

and the next would be

1 time 1, 1 time 3, 2 times 1, 3 times 2, 1 time 1

1113213211

and so on.

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14y ago
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Q: What is the next in the series 1 11 21 1211 111221 312211?
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