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 | 1 |
| 5 | 2 |
| 6 | 7 |
| 7 | 22 |
| 8 | 57 |
| 9 | 128 |
| 10 | 268 |
| 11 | 573 |
| 12 | 1343 |
| 13 | 3434 |
| 14 | 9038 |
| 15 | 23374 |
| 16 | 58649 |
| 17 | 144400 |
| 18 | 355992 |
| 19 | 892336 |
| 20 | 2280020 |
| 21 | 5892301 |
| 22 | 15253305 |
| 23 | 39347067 |
| 24 | 101177783 |
| 25 | 260255812 |
| 26 | 671941182 |
| 27 | 1743500452 |
| 28 | 4542147622 |
| 29 | 11858732144 |
| 30 | 30983904244 |
| 31 | 80982376879 |
| 32 | 211831943129 |
| 33 | 554905957520 |