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 | 0 |
| 1 | 2 |
| 2 | 32 |
| 3 | 258 |
| 4 | 1408 |
| 5 | 5890 |
| 6 | 20256 |
| 7 | 59906 |
| 8 | 157184 |
| 9 | 374274 |
| 10 | 822560 |
| 11 | 1690370 |
| 12 | 3281280 |
| 13 | 6065410 |
| 14 | 10746400 |
| 15 | 18347010 |
| 16 | 30316544 |
| 17 | 48663554 |
| 18 | 76117536 |
| 19 | 116323586 |
| 20 | 174074240 |
| 21 | 255582978 |
| 22 | 368804128 |
| 23 | 523804162 |
| 24 | 733189632 |