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 | 1 |
| 3 | 6 |
| 4 | 118 |
| 5 | 7000 |
| 6 | 1329496 |
| 7 | 868255024 |
| 8 | 2039295163312 |
| 9 | 17639804273910144 |
| 10 | 569596637165777524096 |
| 11 | 69273803156588266525129984 |
| 12 | 31940576331984155835757999795456 |
| 13 | 56121305700570450429977355284230355968 |
| 14 | 377361653292638108206937443603065676106341376 |