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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | 1 |
| 7 | 3 |
| 8 | 12 |
| 9 | 36 |
| 10 | 1 |
| 11 | 4 |
| 12 | 24 |
| 13 | 144 |
| 14 | 576 |
| 15 | 1 |
| 16 | 5 |
| 17 | 40 |
| 18 | 360 |
| 19 | 2880 |
| 20 | 14400 |
| 21 | 1 |
| 22 | 6 |
| 23 | 60 |
| 24 | 720 |
| 25 | 8640 |
| 26 | 86400 |
| 27 | 518400 |
| 28 | 1 |
| 29 | 7 |
| 30 | 84 |
| 31 | 1260 |
| 32 | 20160 |
| 33 | 302400 |
| 34 | 3628800 |
| 35 | 25401600 |
| 36 | 1 |
| 37 | 8 |
| 38 | 112 |
| 39 | 2016 |
| 40 | 40320 |
| 41 | 806400 |
| 42 | 14515200 |
| 43 | 203212800 |
| 44 | 1625702400 |