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 | 308 |
| 4 | 9240 |
| 5 | 351120 |
| 6 | 16151520 |
| 7 | 872182080 |
| 8 | 54075288960 |
| 9 | 3785270227200 |
| 10 | 295251077721600 |
| 11 | 25391592684057600 |
| 12 | 2386809712301414400 |
| 13 | 243454590654744268800 |
| 14 | 26780004972021869568000 |
| 15 | 3160040586698580609024000 |
| 16 | 398165113924021156737024000 |
| 17 | 53354125265818835002761216000 |