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 | 2 |
| 3 | 1 |
| 4 | 16 |
| 5 | 28 |
| 6 | 1 |
| 7 | 272 |
| 8 | 1032 |
| 9 | 270 |
| 10 | 1 |
| 11 | 7936 |
| 12 | 52736 |
| 13 | 36096 |
| 14 | 2456 |
| 15 | 1 |
| 16 | 353792 |
| 17 | 3646208 |
| 18 | 4766048 |
| 19 | 1035088 |
| 20 | 22138 |
| 21 | 1 |
| 22 | 22368256 |
| 23 | 330545664 |
| 24 | 704357760 |
| 25 | 319830400 |
| 26 | 27426960 |
| 27 | 199284 |
| 28 | 1 |
| 29 | 1903757312 |
| 30 | 38188155904 |
| 31 | 120536980224 |
| 32 | 93989648000 |