Generate the look-and-say (Conway) sequence, step to the next or previous term, and find which term a number is.
The look-and-say sequence
(also called Conway's sequence or the count-and-say sequence) builds each term by reading the digits of the term before it out loud,
then writing down what you said. Starting from 1 you get
1, 11, 21, 1211, 111221, 312211, ...
Read 1211 as "one 1, one 2, two 1s", which you write as
111221. It turns up in puzzle caches as a "what comes next" sequence, so this tool can
generate it from any seed, step a single term forward or backward, and tell you which term a given number is.
Generate the sequence
Digits only. The classic sequence starts at 1.
1 to 40. Terms grow quickly.
Step from a term
Next reads it aloud. Previous works only when the term is a valid look-and-say result.