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 | 1 |
| 2 | 7 |
| 3 | 301 |
| 4 | 77959 |
| 5 | 121226245 |
| 6 | 1131162092095 |
| 7 | 63330372050122765 |
| 8 | 21274128570193389587095 |
| 9 | 42878835824239014254983869205 |
| 10 | 518543838148941095553869851505328175 |
| 11 | 37625235473766496167083515195884075739704925 |
| 12 | 16380389585902052954270520869620904155598347770499975 |