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 | 7 |
| 2 | 56 |
| 3 | 3724 |
| 4 | 333312 |
| 5 | 939466752 |
| 6 | 88884432000 |
| 7 | 95088913920 |
| 8 | 183694492800 |
| 9 | 85621850496000 |
| 10 | 120354474240000 |
| 11 | 176951824358400 |
| 12 | 239555577824640 |
| 13 | 268015772344320 |
| 14 | 2056513874688000 |
| 15 | 9918742759833600 |
| 16 | 93442741956748800 |
| 17 | 149180517860774400 |
| 18 | 230762478968017920 |