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 | 1 |
| 3 | 2 |
| 4 | 2 |
| 5 | 2 |
| 6 | 4 |
| 7 | 24 |
| 8 | 24 |
| 9 | 48 |
| 10 | 48 |
| 11 | 96 |
| 12 | 576 |
| 13 | 576 |
| 14 | 1152 |
| 15 | 34560 |
| 16 | 207360 |
| 17 | 414720 |
| 18 | 414720 |
| 19 | 829440 |
| 20 | 174182400 |
| 21 | 1045094400 |
| 22 | 2090188800 |
| 23 | 2090188800 |
| 24 | 2090188800 |
| 25 | 4180377600 |
| 26 | 25082265600 |
| 27 | 25082265600 |
| 28 | 50164531200 |
| 29 | 1504935936000 |
| 30 | 3009871872000 |
| 31 | 18059231232000 |