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 | 361 |
| 3 | 25131 |
| 4 | 998670 |
| 5 | 50519822 |
| 6 | 2766909379 |
| 7 | 147310312318 |
| 8 | 7792601909575 |
| 9 | 413221140108695 |
| 10 | 21925142145040301 |
| 11 | 1163067389442877369 |
| 12 | 61694202460260635301 |
| 13 | 3272597655031259362393 |
| 14 | 173597299390133576071391 |