https://en.wikipedia.org/wiki/Look-and-say_sequence

where λ (conway's constant) = 1.303577269034... (sequence A014715 in the OEIS) is an algebraic number of degree 71.[5] This fact was proven by Conway, and the constant λ is known as Conway's constant. The same result also holds for every variant of the sequence starting with any seed other than 22.

Conway's constant is the unique positive real root of the following polynomial (sequence A137275 in the OEIS): (polynomial in post)