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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 8 |
| 6 | 412 |
| 7 | 54 |
| 8 | 59309 |
| 9 | 176087633490076859 |
| 10 | 18569 |
| 11 | 81059275440235943 |
| 12 | 1615066814060816060766626689229243976663152060069 |
| 13 | 5644184595206308867273871 |