Look and Say Sequence
Conway's look-and-say sequence generator.
- 1.1(1 digits)
- 2.11(2 digits)
- 3.21(2 digits)
- 4.1211(4 digits)
- 5.111221(6 digits)
- 6.312211(6 digits)
- 7.13112221(8 digits)
- 8.1113213211(10 digits)
How it reads
Read each row aloud as a count of digits: "1" → "one one" → "11" → "two ones" → "21" → "one two, one one" → "1211"... and so on.
John Conway proved the length grows by a factor of 1.303577... per step (Conway's constant).
Conway's look-and-say sequence. Famous fact: digits never exceed 3, and the limiting growth rate (Conway's constant) is the only positive real root of a degree-71 polynomial Conway found in 1986.
About
Pick a seed and number of iterations. Each row reads the previous row aloud (1 → 11 → 21 → 1211 → 111221). Famous mathematical sequence by John Conway with surprising properties.
How to use
- Pick a seed and iterations.
FAQ
Why does it always start small?+
Conway proved the sequence grows by a factor of 1.303577... per step. Start with 1 and after 30 steps you're around 5,800 digits.