Uniqueness of the seed digit 3 property in audioactive (look-and-say) sequences

Determine whether the property that arises from the seed digit 3 in audioactive (look-and-say) sequences is unique to the seed digit 3 among all possible seed digits, or whether the same property occurs for other seed digits as well.

Background

This problem concerns the behavior of audioactive (look-and-say) sequences, which were studied by Robert Morris and John Conway. The question asks whether a particular property associated with starting the sequence from the seed digit 3 is unique to that seed or can appear from other seeds. The authors note Conway’s classification of 92 elements in look-and-say sequences, suggesting possible differences in parsing or interpretation, which motivates clarifying the uniqueness of the property tied to the seed digit 3.