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 | 28 |
| 2 | 448 |
| 3 | 5376 |
| 4 | 53760 |
| 5 | 473088 |
| 6 | 3784704 |
| 7 | 28114944 |
| 8 | 196804608 |
| 9 | 1312030720 |
| 10 | 8396996608 |
| 11 | 51908706304 |
| 12 | 311452237824 |
| 13 | 1820797698048 |
| 14 | 10404558274560 |
| 15 | 58265526337536 |
| 16 | 320460394856448 |
| 17 | 1734256254517248 |
| 18 | 9249366690758656 |
| 19 | 48680877319782400 |
| 20 | 253140562062868480 |