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) |
|---|---|
| 2 | 1 |
| 3 | 2 |
| 4 | 2 |
| 5 | 6 |
| 6 | 9 |
| 7 | 36 |
| 8 | 36 |
| 9 | 72 |
| 10 | 144 |
| 11 | 720 |
| 12 | 960 |
| 13 | 5760 |
| 14 | 14400 |
| 15 | 36000 |
| 16 | 36000 |
| 17 | 252000 |
| 18 | 420000 |
| 19 | 3360000 |
| 20 | 5600000 |
| 21 | 16800000 |
| 22 | 50400000 |
| 23 | 453600000 |
| 24 | 567000000 |
| 25 | 1701000000 |
| 26 | 5953500000 |
| 27 | 11907000000 |
| 28 | 23814000000 |
| 29 | 238140000000 |
| 30 | 476280000000 |
| 31 | 5239080000000 |
| 32 | 5239080000000 |