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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 1 |
| 6 | 12 |
| 7 | 1 |
| 8 | 24 |
| 9 | 6 |
| 10 | 40 |
| 11 | 1 |
| 12 | 4320 |
| 13 | 1 |
| 14 | 84 |
| 15 | 120 |
| 16 | 1344 |
| 17 | 1 |
| 18 | 25920 |
| 19 | 1 |
| 20 | 43200 |
| 21 | 252 |
| 22 | 220 |
| 23 | 1 |
| 24 | 31933440 |
| 25 | 20 |
| 26 | 312 |
| 27 | 432 |
| 28 | 183456 |
| 29 | 1 |
| 30 | 136080000 |
| 31 | 1 |
| 32 | 322560 |
| 33 | 660 |
| 34 | 544 |
| 35 | 840 |
| 36 | 12563527680 |
| 37 | 1 |
| 38 | 684 |
| 39 | 936 |
| 40 | 919296000 |
| 41 | 1 |
| 42 | 1155772800 |
| 43 | 1 |
| 44 | 1219680 |
| 45 | 1814400 |
| 46 | 1012 |
| 47 | 1 |