The next number in the series is 13112221.
312211
1113213211
1311221
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
31131211131221
Is the fourth term correct? Should it not be 111221? Then the next term would be 13112221
331131211131221
13211221 111312212211 31131211131221 13211311123113112211 11121221133112132113212221 3112112221232112111312211312113211 1321122132111213122112311311222113111221131221 31131122112231131112132112311321322112111312211312111322212311322113212221
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)]