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 | 2 |
| 2 | 1 |
| 3 | 12 |
| 4 | 8 |
| 5 | 1 |
| 6 | 80 |
| 7 | 60 |
| 8 | 12 |
| 9 | 1 |
| 10 | 560 |
| 11 | 448 |
| 12 | 112 |
| 13 | 16 |
| 14 | 1 |
| 15 | 4032 |
| 16 | 3360 |
| 17 | 960 |
| 18 | 180 |
| 19 | 20 |
| 20 | 1 |
| 21 | 29568 |
| 22 | 25344 |
| 23 | 7920 |
| 24 | 1760 |
| 25 | 264 |
| 26 | 24 |
| 27 | 1 |
| 28 | 219648 |
| 29 | 192192 |
| 30 | 64064 |
| 31 | 16016 |
| 32 | 2912 |
| 33 | 364 |
| 34 | 28 |
| 35 | 1 |
| 36 | 1647360 |
| 37 | 1464320 |
| 38 | 512512 |
| 39 | 139776 |
| 40 | 29120 |
| 41 | 4480 |
| 42 | 480 |
| 43 | 32 |
| 44 | 1 |
| 45 | 12446720 |