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 | 4 |
| 3 | 36 |
| 4 | 128 |
| 5 | 2025 |
| 6 | 21025 |
| 7 | 279936 |
| 8 | 4338889 |
| 9 | 449482401 |
| 10 | 78701569444 |
| 11 | 373669453125 |
| 12 | 18845583322500 |
| 13 | 1347646586640625 |
| 14 | 202054211912421649 |
| 15 | 6193981883008128893161 |
| 16 | 139629322539586311507076 |
| 17 | 170147232533595290155627 |
| 18 | 355156175404848064835984400 |