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 | 0 |
| 2 | 256 |
| 3 | 9216 |
| 4 | 196608 |
| 5 | 3276800 |
| 6 | 47185920 |
| 7 | 616562688 |
| 8 | 7516192768 |
| 9 | 86973087744 |
| 10 | 966367641600 |
| 11 | 10393820856320 |
| 12 | 108851651149824 |
| 13 | 1114904790564864 |
| 14 | 11206222510292992 |
| 15 | 110830772079820800 |
| 16 | 1080863910568919040 |