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) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 4 |
| 5 | 13 |
| 6 | 44 |
| 7 | 213 |
| 8 | 344 |
| 9 | 5344 |
| 10 | 50213 |
| 11 | 205344 |
| 12 | 350213 |
| 13 | 1350213 |
| 14 | 4205344 |
| 15 | 21350213 |
| 16 | 34205344 |
| 17 | 221350213 |
| 18 | 334205344 |
| 19 | 2221350213 |
| 20 | 3334205344 |
| 21 | 52221350213 |
| 22 | 152221350213 |
| 23 | 403334205344 |
| 24 | 5152221350213 |
| 25 | 55152221350213 |
| 26 | 155152221350213 |
| 27 | 400403334205344 |