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 | 45 |
| 8 | 92 |
| 9 | 182 |
| 10 | 342 |
| 11 | 601 |
| 12 | 982 |
| 13 | 1499 |
| 14 | 2169 |
| 15 | 2970 |
| 16 | 3994 |
| 17 | 5297 |
| 18 | 6834 |
| 19 | 8635 |
| 20 | 10714 |
| 21 | 13121 |
| 22 | 16104 |
| 23 | 19674 |
| 24 | 23868 |
| 25 | 28453 |
| 26 | 33637 |
| 27 | 39630 |
| 28 | 46730 |