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 | 2 |
| 4 | 6 |
| 5 | 12 |
| 6 | 12 |
| 7 | 48 |
| 8 | 144 |
| 9 | 288 |
| 10 | 288 |
| 11 | 1440 |
| 12 | 5760 |
| 13 | 17280 |
| 14 | 34560 |
| 15 | 34560 |
| 16 | 207360 |
| 17 | 1036800 |
| 18 | 4147200 |
| 19 | 12441600 |
| 20 | 24883200 |
| 21 | 24883200 |
| 22 | 174182400 |
| 23 | 1045094400 |
| 24 | 5225472000 |
| 25 | 20901888000 |
| 26 | 62705664000 |
| 27 | 125411328000 |
| 28 | 125411328000 |
| 29 | 1003290624000 |
| 30 | 7023034368000 |