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 | 16 |
| 3 | 648 |
| 4 | 6912 |
| 5 | 1080000 |
| 6 | 144000 |
| 7 | 57624000 |
| 8 | 526848000 |
| 9 | 144027072000 |
| 10 | 160030080000 |
| 11 | 234300040128000 |
| 12 | 255600043776000 |
| 13 | 608349404190528000 |
| 14 | 655145512205184000 |
| 15 | 701941620219840000 |
| 16 | 5989901825875968000 |
| 17 | 31267661899936670208000 |
| 18 | 3678548458816078848000 |