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 | 1 |
| 5 | 2 |
| 6 | 1 |
| 7 | 2 |
| 8 | 6 |
| 9 | 8 |
| 10 | 3 |
| 11 | 8 |
| 12 | 10 |
| 13 | 36 |
| 14 | 24 |
| 15 | 8 |
| 16 | 30 |
| 17 | 288 |
| 18 | 420 |
| 19 | 1920 |
| 20 | 2268 |
| 21 | 640 |
| 22 | 270 |
| 23 | 2880 |
| 24 | 9240 |
| 25 | 13824 |
| 26 | 7560 |
| 27 | 19200 |
| 28 | 17820 |
| 29 | 120960 |
| 30 | 64064 |
| 31 | 362880 |
| 32 | 5054400 |
| 33 | 1881600 |
| 34 | 475200 |
| 35 | 165888 |
| 36 | 464100 |
| 37 | 6386688 |
| 38 | 4082400 |
| 39 | 1228800 |
| 40 | 2120580 |
| 41 | 34836480 |
| 42 | 23474880 |
| 43 | 217728000 |