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) |
|---|---|
| 3 | 1 |
| 4 | 216 |
| 5 | 1 |
| 6 | 74088 |
| 7 | 728 |
| 8 | 1 |
| 9 | 37933056 |
| 10 | 604800 |
| 11 | 1728 |
| 12 | 1 |
| 13 | 27653197824 |
| 14 | 642733056 |
| 15 | 2904768 |
| 16 | 3456 |
| 17 | 1 |
| 18 | 27653197824000 |
| 19 | 883130895360 |
| 20 | 5662172160 |
| 21 | 10497600 |
| 22 | 6200 |
| 23 | 1 |
| 24 | 36806406303744000 |
| 25 | 1553703385006080 |
| 26 | 13322923130880 |
| 27 | 34467586560 |
| 28 | 31422600 |
| 29 | 10296 |
| 30 | 1 |
| 31 | 63601470092869632000 |
| 32 | 3450292743162101760 |
| 33 | 38111804456140800 |
| 34 | 129651027770880 |
| 35 | 163174556160 |
| 36 | 82006848 |
| 37 | 16128 |
| 38 | 1 |