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 | 0 |
| 2 | 0 |
| 3 | 66 |
| 4 | 30772 |
| 5 | 9317846 |
| 6 | 4026240722 |
| 7 | 3637198028018 |
| 8 | 8472288445687482 |
| 9 | 56864856173457018228 |
| 10 | 1168082099198500119983316 |