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 | 3 |
| 3 | 4 |
| 4 | 13 |
| 5 | 36 |
| 6 | 24 |
| 7 | 75 |
| 8 | 316 |
| 9 | 432 |
| 10 | 192 |
| 11 | 541 |
| 12 | 3060 |
| 13 | 6360 |
| 14 | 5760 |
| 15 | 1920 |
| 16 | 4683 |
| 17 | 33244 |
| 18 | 92880 |
| 19 | 127680 |
| 20 | 86400 |
| 21 | 23040 |
| 22 | 47293 |
| 23 | 403956 |
| 24 | 1418424 |
| 25 | 2620800 |
| 26 | 2688000 |
| 27 | 1451520 |
| 28 | 322560 |
| 29 | 545835 |
| 30 | 5449756 |
| 31 | 23051952 |
| 32 | 53548992 |
| 33 | 73785600 |
| 34 | 60318720 |
| 35 | 27095040 |
| 36 | 5160960 |
| 37 | 7087261 |
| 38 | 80985780 |
| 39 | 400813080 |
| 40 | 1122145920 |
| 41 | 1943867520 |
| 42 | 2133734400 |