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 | 10 |
| 2 | 236 |
| 3 | 8472 |
| 4 | 359944 |
| 5 | 16722896 |
| 6 | 822334816 |
| 7 | 42068907200 |
| 8 | 2215884717400 |
| 9 | 119364801362800 |
| 10 | 6545334930678816 |
| 11 | 364137834051739200 |
| 12 | 20502307365808906816 |
| 13 | 1166063313963833813632 |
| 14 | 66893439680369963627264 |