# Look and say sequence generator

## World's simplest number tool

Quickly calculate a list of look and say numbers in your browser. To get your sequence, just enter the starting alphabet, starting term position, and the length of the sequence in the options below, and this utility will calculate that sequence. Created by developers for developers.

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Look and say sequence generator tool
What is a look and say sequence generator?

This is an online browser-based utility for generating a list of look and say numbers. The look and say sequence, invented by mathematician John Conway and popularized by Robert Morris, is also known as "count and say sequence" or "say what you see sequence". It's generated by describing a series of digits as letters in plain English language. The n-th term is constructed by reading the (n-1)-th term. For example, if the first term is "1", then to get the next term, we read what we see – "one one" and we get the next term – "11". Now, when we read this term, we say "two ones" and we get the third term – "21", and so it goes on. In this tool, you can specify the initial alphabet for the first term. It can be a series of digits and letters that will be read and described further in the sequence. You can also set the starting term position, specify how many following values you need, and adjust the separating character between terms. That's numberwang!

Look and say sequence generator examples
Click to use

First Ten Look and Say Numbers

In this example, we generate the first 10 numbers of the count and say sequence, outputting each term on a new line.

1
11
21
1211
111221
312211
13112221
1113213211
31131211131221
13211311123113112211

**Required options**

Specify a series of digits and/or
letters for the first term.

Starting look and say
sequence term.

Generate this many
look and say numbers.

Split look and say sequence terms
by this symbol. (By default newline.)

20th Term of Morris Number Sequence

The look and say sequence is often called Morris sequence as it was popularized by cryptographer Robert Morris. In this example, we calculate the 20th term of the Morris number sequence, by specifying the starting number 20, and the amount 1.

11131221131211132221232112111312111213111213211231132132211211131221131211221321123113213221123113112221131112311332211211131221131211132211121312211231131112311211232221121321132132211331121321231231121113112221121321133112132112312321123113112221121113122113121113123112112322111213211322211312113211

**Required options**

Specify a series of digits and/or
letters for the first term.

Starting look and say
sequence term.

Generate this many
look and say numbers.

Split look and say sequence terms
by this symbol. (By default newline.)

Arrow-separated Terms

In this example, we put an arrow character between the say what you see sequence numbers in order to better illustrate the flow of sequence members.

1 → 11 → 21 → 1211 → 111221 → 312211 → 13112221

**Required options**

Specify a series of digits and/or
letters for the first term.

Starting look and say
sequence term.

Generate this many
look and say numbers.

Split look and say sequence terms
by this symbol. (By default newline.)

Alphanumeric Sequence

In this example, we generate an alphanumeric look and say sequence. The first term consists of the first three letters of the English alphabet "abc". When we read it aloud we say "one a, one b, one c". As a result, we get "1a1b1c" as the second term. In the following values, the digits change but the three initial letters remain unchanged.

abc
1a1b1c
111a111b111c
311a311b311c
13211a13211b13211c

**Required options**

Specify a series of digits and/or
letters for the first term.

Starting look and say
sequence term.

Generate this many
look and say numbers.

Split look and say sequence terms
by this symbol. (By default newline.)

Fixed Point

In this example, we illustrate the fixed point of look and say sequence. The members of the sequence in this example are constant and never change. It's because they are written the same way they are read. This sequence is only possible if the initial alphabet is "22". Reading it aloud "two twos", we get the same following term. We generate 15 such constants and separate them by a space. This sequence is also sometimes called degenerate sequence as it never changes.

22 22 22 22 22 22 22 22 22 22 22 22 22 22 22

**Required options**

Specify a series of digits and/or
letters for the first term.

Starting look and say
sequence term.

Generate this many
look and say numbers.

Split look and say sequence terms
by this symbol. (By default newline.)

Conway's Sequence

This example generates Conway's sequence. This sequence, invented by mathematician Ilan Vardi, is a variation of look and say sequence and the only change is that the starting number is "3". We calculate eight Conway sequence's members and display each of them on a new line.

3
13
1113
3113
132113
1113122113
311311222113
13211321322113

**Required options**

Specify a series of digits and/or
letters for the first term.

Starting look and say
sequence term.

Generate this many
look and say numbers.

Split look and say sequence terms
by this symbol. (By default newline.)

Pro tips
Master online number tools

You can pass options to this tool using their codes as query arguments and it will automatically compute output. To get the code of an option, just hover over its icon. Here's how to type it in your browser's address bar. Click to try!

https://onlinenumbertools.com/generate-look-and-say-numbers?&first-element=1&count=10&separator=%5Cn&alphabet=1

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