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 | 3 |
| 6 | 1 |
| 7 | 4 |
| 8 | 24 |
| 9 | 15 |
| 10 | 2 |
| 11 | 12 |
| 12 | 316 |
| 13 | 888 |
| 14 | 156 |
| 15 | 4 |
| 16 | 36 |
| 17 | 6080 |
| 18 | 84672 |
| 19 | 58368 |
| 20 | 2032 |
| 21 | 8 |
| 22 | 144 |
| 23 | 149824 |
| 24 | 17444160 |
| 25 | 66194496 |
| 26 | 7019136 |
| 27 | 30912 |
| 28 | 24 |
| 29 | 576 |
| 30 | 5728896 |
| 31 | 5356808640 |