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Look and Say Sequence 1 13 1113

March 9th, 2008 · No Comments · Alex

Wow, Alex sowed me this problem and it is kind of incredible. As Mathworld says this is a numeric sequence where you start with a single digit, say “3” and then the next number describes the previous, so the next term is a single 3 or “13”, so the sequence looks like 1, 13, 1113, 3113 (that is three one’s and one 3) and then 132123 (that is one 3, then two 1’s, then two 3’s).

You can actually write this down analytically and the terms converges to lambda 1.30357726… which is called Conway’s constant

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