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 | 3 |
| 2 | 161 |
| 3 | 27379 |
| 4 | 9478657 |
| 5 | 5517751251 |
| 6 | 4841332221601 |
| 7 | 5964153172084899 |
| 8 | 9814664424981012481 |
| 9 | 20791777842234580902499 |
| 10 | 55106605639755476546020001 |
| 11 | 178627672869645203363556318483 |
| 12 | 695165908550906808156689590141441 |