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 | 4 |
| 5 | 4 |
| 6 | 1 |
| 7 | 14 |
| 8 | 36 |
| 9 | 24 |
| 10 | 1 |
| 11 | 48 |
| 12 | 240 |
| 13 | 384 |
| 14 | 192 |
| 15 | 1 |
| 16 | 162 |
| 17 | 1440 |
| 18 | 4160 |
| 19 | 4800 |
| 20 | 1920 |
| 21 | 1 |
| 22 | 536 |
| 23 | 8216 |
| 24 | 38400 |
| 25 | 76800 |
| 26 | 69120 |
| 27 | 23040 |
| 28 | 1 |
| 29 | 1738 |
| 30 | 45528 |
| 31 | 326032 |
| 32 | 1008000 |
| 33 | 1532160 |
| 34 | 1128960 |
| 35 | 322560 |
| 36 | 1 |
| 37 | 5536 |
| 38 | 247456 |
| 39 | 2634240 |
| 40 | 11854080 |
| 41 | 27095040 |
| 42 | 33116160 |