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 | 2 |
| 2 | -7 |
| 3 | -54 |
| 4 | -175 |
| 5 | -382 |
| 6 | -567 |
| 7 | -214 |
| 8 | 2465 |
| 9 | 13122 |
| 10 | 49049 |
| 11 | 162506 |
| 12 | 510705 |
| 13 | 1565762 |
| 14 | 4744553 |
| 15 | 14298282 |
| 16 | 42981185 |
| 17 | 129056642 |
| 18 | 387315513 |
| 19 | 1162131146 |
| 20 | 3486624401 |
| 21 | 10460158722 |
| 22 | 31380825353 |
| 23 | 94142898986 |
| 24 | 282429204705 |