cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A221373 A two-digit Look-and-Say sequence starting with 99: each term summarizes the increasing two-digit substrings of the previous term.

Table of values

n a(n)
0 99
1 199
2 119199
3 111219191199
4 311112319121291199
5 411312219121123129231291199
6 311512113219221122223229331141291192199
7 511312113114115319421522123229231232133141151191292193199
8 611412313214315419521222323229631232133241142251152153191292193194199

List of values

[99, 199, 119199, 111219191199, 311112319121291199, 411312219121123129231291199, 311512113219221122223229331141291192199, 511312113114115319421522123229231232133141151191292193199, 611412313214315419521222323229631232133241142251152153191292193194199]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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