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 | 1 |
| 2 | 5 |
| 3 | 32 |
| 4 | 288 |
| 5 | 3413 |
| 6 | 50069 |
| 7 | 873612 |
| 8 | 17650828 |
| 9 | 405071317 |
| 10 | 10405071317 |
| 11 | 295716741928 |
| 12 | 9211817190184 |
| 13 | 312086923782437 |
| 14 | 11424093749340453 |
| 15 | 449317984130199828 |
| 16 | 18896062057839751444 |
| 17 | 846136323944176515621 |