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 | 10 |
| 3 | 180 |
| 4 | 4680 |
| 5 | 159120 |
| 6 | 6683040 |
| 7 | 334152000 |
| 8 | 19380816000 |
| 9 | 1279133856000 |
| 10 | 94655905344000 |
| 11 | 7761784238208000 |
| 12 | 698560581438720000 |
| 13 | 68458936980994560000 |
| 14 | 7256647319985423360000 |
| 15 | 827257794478338263040000 |
| 16 | 100925450926357268090880000 |
| 17 | 13120308620426444851814400000 |