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.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 1411 |
| 3 | 2431 |
| 4 | 24131241 |
| 5 | 34233241 |
| 6 | 44434241 |
| 7 | 74433221 |
| 8 | 1774333221 |
| 9 | 3734534231 |
| 10 | 371534733231 |
| 11 | 372534932231 |
| 12 | 19372524934231 |
| 13 | 39272534736231 |
| 14 | 3937162534736231 |
| 15 | 2947362524935231 |
| 16 | 3937363534836231 |