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 | 24 |
| 2 | 2880 |
| 3 | 40320 |
| 4 | 215040 |
| 5 | 608256 |
| 6 | 738017280 |
| 7 | 1277952 |
| 8 | 4010803200 |
| 9 | 32006209536 |
| 10 | 65745715200 |
| 11 | 1736441856 |
| 12 | 12641296711680 |
| 13 | 10066329600 |
| 14 | 12611097722880 |
| 15 | 1337897345089536 |
| 16 | 1086454927196160 |
| 17 | 3401614098432 |
| 18 | 83088011510887219200 |
| 19 | 61022895341568 |