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 | 6 |
| 2 | 60 |
| 3 | 840 |
| 4 | 12600 |
| 5 | 264600 |
| 6 | 5821200 |
| 7 | 151351200 |
| 8 | 4994589600 |
| 9 | 169816046400 |
| 10 | 5943561624000 |
| 11 | 225855341712000 |
| 12 | 8808358326768000 |
| 13 | 405184483031328000 |
| 14 | 20664408634597728000 |
| 15 | 1136542474902875040000 |
| 16 | 64782921069463877280000 |
| 17 | 3757409422028904882240000 |