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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 9 |
| 6 | 20 |
| 7 | 48 |
| 8 | 113 |
| 9 | 262 |
| 10 | 591 |
| 11 | 1263 |
| 12 | 2505 |
| 13 | 4764 |
| 14 | 8479 |
| 15 | 14285 |
| 16 | 22871 |
| 17 | 35316 |
| 18 | 52755 |
| 19 | 76517 |
| 20 | 107826 |
| 21 | 148914 |
| 22 | 202715 |
| 23 | 270622 |