Question

This is the problem:
1

1 1

2 1

1 2 11

111221

312211

13112221

1113213211

???????????​

Answer 1

Next answer is 31131211131221

1 - here we have one ones so nxt we get 11 ( one one)

11 - here there are two ones so we get the next one as 21 ( two one )

21 - here we have one two's, one ones so the next we get 1211

1211 - here we have one ones, one two's, two ones so the nxt number is 111221

111221 - here there are three ones, two two's, one ones, we get 312211

312211 - here we have one three, one one, two two, two one so the nxt number is 13112221

13112221 - here the numbers are one ones, one three, two ones, three two's, one one so the nxt number is 1113213211

Finally, answer for your question is..

1113213211 - three ones, one three, one two, one ones, one three, one two, two ones..

Here we go the answer is.. 31131211131221