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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 7 |
| 5 | 13 |
| 6 | 23 |
| 7 | 45 |
| 8 | 86 |
| 9 | 159 |
| 10 | 303 |
| 11 | 568 |
| 12 | 1069 |
| 13 | 2005 |
| 14 | 3769 |
| 15 | 7066 |
| 16 | 13251 |
| 17 | 24821 |
| 18 | 46482 |
| 19 | 86988 |
| 20 | 162758 |