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 | 8 |
| 2 | 80 |
| 3 | 960 |
| 4 | 13440 |
| 5 | 215040 |
| 6 | 3870720 |
| 7 | 77414400 |
| 8 | 1703116800 |
| 9 | 40874803200 |
| 10 | 1062744883200 |
| 11 | 29756856729600 |
| 12 | 892705701888000 |
| 13 | 28566582460416000 |
| 14 | 971263803654144000 |
| 15 | 34965496931549184000 |
| 16 | 1328688883398868992000 |