Look-and-Say Biochemistry: Exponential RNA and Multistranded DNA

Look-and-Say sequences (LS-sequences, for short) are built by beginning with an arbitrary string of numerical digits as a zeroth term, or seed, and then describing the present term to get the next. For example, take 1 as seed (to generate the standard LS-sequence). We can describe it as “one one,” so the first term is 11. This is “two ones,” so the next term is 21. Now we have “one two, one one,” and so we get 1211. These are the first terms in the standard LS-sequence: