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 | 6 |
| 4 | 6 |
| 5 | 30 |
| 6 | 30 |
| 7 | 30 |
| 8 | 240 |
| 9 | 240 |
| 10 | 240 |
| 11 | 240 |
| 12 | 240 |
| 13 | 3120 |
| 14 | 3120 |
| 15 | 3120 |
| 16 | 3120 |
| 17 | 3120 |
| 18 | 3120 |
| 19 | 3120 |
| 20 | 3120 |
| 21 | 65520 |
| 22 | 65520 |
| 23 | 65520 |
| 24 | 65520 |
| 25 | 65520 |
| 26 | 65520 |
| 27 | 65520 |
| 28 | 65520 |
| 29 | 65520 |
| 30 | 65520 |
| 31 | 65520 |
| 32 | 65520 |
| 33 | 65520 |