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) |
|---|---|
| 0 | 1 |
| 1 | 24 |
| 2 | 624 |
| 3 | 15600 |
| 4 | 390600 |
| 5 | 9764976 |
| 6 | 244140000 |
| 7 | 6103499376 |
| 8 | 152587874400 |
| 9 | 3814696859400 |
| 10 | 95367431234400 |
| 11 | 2384185780844400 |
| 12 | 59604644765235024 |
| 13 | 1490116119130470000 |
| 14 | 37252902984364860000 |
| 15 | 931322574609121110624 |
| 16 | 23283064365380605500600 |
| 17 | 582076609134515127375600 |