# 1, 11, 21, 1211, 111221, 312211, 13112221, 1113213211, what are the next few sequences? - Help.com

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## 1, 11, 21, 1211, 111221, 312211, 13112221, 1113213211, what are the next few sequences?

This open post was written 6 years, 2 months ago | V/U/S: 7,375, 12, 9 | Edit Post | Leave a reply | Report Post

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do your own homework! try multiplication tables though

sorry not following

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multiplication tables…im telling you how to find the answer without telling you the actual answer, honestly!

Maybe I’ve been looking at this too long…sorry to sound so dumb..I’m stuck at looking at it they way I started!

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sill don’t get it

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It’s the “look and say” sequence…
1
11
21
1211
111221
312211
13112221
1113213211
31131211131221
13211311123113112211
11131221133112132113212221
3113112221232112111312211312113211

Help me with: Who here uses Ubuntu?

how do you figure this out?

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read it out loud and you’ll figure it out.

One
One one
two one
one two one one….

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you just define the previous line by numbers :)

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i can do this to

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pretty obvious…..

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1113213211
The first row - 1 - contains one 1 -> 11
11 contains two 1’s -> 21
21 contains one 2, one 1 ->1211
1211 contains one 1, one 2, two 1’s ->111221
etcetera.
Building on that theory, it would go

111221 contains three 1’s, two 2’s, one 1-> 312211
312211 contains one 3,one 1,two 2’s two 1’s->13112221
13112221 contains one 1,one 3,three 2’s, one 1,

therefore the next sequence of numbers would be ->1113213211
Note that even if this sequence was continued infinitely, you would never get 4 or more as a sequence, as this would require you to have two sets of the same number next to each other, which is impossible.

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