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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 7 |
| 7 | 13 |
| 8 | 31 |
| 9 | 60 |
| 10 | 146 |
| 11 | 320 |
| 12 | 787 |
| 13 | 1864 |
| 14 | 4654 |
| 15 | 11526 |
| 16 | 29318 |
| 17 | 74632 |
| 18 | 192868 |
| 19 | 500487 |
| 20 | 1310826 |