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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 18 |
| 5 | 36 |
| 6 | 96 |
| 7 | 144 |
| 8 | 336 |
| 9 | 1120 |
| 10 | 960 |
| 11 | 960 |
| 12 | 4320 |
| 13 | 5760 |
| 14 | 9504 |
| 15 | 29568 |
| 16 | 161280 |
| 17 | 80640 |
| 18 | 884736 |
| 19 | 110592 |
| 20 | 155520 |
| 21 | 460800 |
| 22 | 729600 |
| 23 | 2188800 |
| 24 | 929280 |
| 25 | 1300992 |
| 26 | 2040192 |
| 27 | 1298304 |
| 28 | 3528000 |
| 29 | 14112000 |
| 30 | 71884800 |
| 31 | 71884800 |
| 32 | 85708800 |
| 33 | 243793920 |