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) |
|---|---|
| 2 | 4 |
| 3 | 6 |
| 4 | 360 |
| 5 | 12 |
| 6 | 1680 |
| 7 | 18 |
| 8 | 4620 |
| 9 | 491400 |
| 10 | 30 |
| 11 | 1884960 |
| 12 | 29640 |
| 13 | 42 |
| 14 | 45540 |
| 15 | 12994800 |
| 16 | 45821160 |
| 17 | 60 |
| 18 | 89369280 |
| 19 | 164220 |
| 20 | 72 |
| 21 | 211110900 |
| 22 | 265680 |
| 23 | 195878760 |
| 24 | 83434347360 |
| 25 | 485100 |
| 26 | 102 |
| 27 | 578760 |
| 28 | 108 |
| 29 | 683760 |
| 30 | 97661867698205811000 |
| 31 | 1073280 |
| 32 | 1799665560 |