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 | 14 |
| 3 | 322 |
| 4 | 10304 |
| 5 | 422464 |
| 6 | 21123200 |
| 7 | 1246268800 |
| 8 | 84746278400 |
| 9 | 6525463436800 |
| 10 | 561189855564800 |
| 11 | 53313036278656000 |
| 12 | 5544555772980224000 |
| 13 | 626534802346765312000 |
| 14 | 76437245886305368064000 |
| 15 | 10013279211106003216384000 |
| 16 | 1401859089554840450293760000 |
| 17 | 208877004343671227093770240000 |