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 | 2 |
| 2 | 6 |
| 3 | 8 |
| 4 | 24 |
| 5 | 120 |
| 6 | 216 |
| 7 | 128 |
| 8 | 384 |
| 9 | 1920 |
| 10 | 3456 |
| 11 | 17280 |
| 12 | 120960 |
| 13 | 432000 |
| 14 | 279936 |
| 15 | 32768 |
| 16 | 98304 |
| 17 | 491520 |
| 18 | 884736 |
| 19 | 4423680 |
| 20 | 30965760 |
| 21 | 110592000 |
| 22 | 71663616 |
| 23 | 358318080 |
| 24 | 2508226560 |
| 25 | 8957952000 |
| 26 | 62705664000 |
| 27 | 689762304000 |
| 28 | 3072577536000 |
| 29 | 5598720000000 |
| 30 | 470184984576 |
| 31 | 2147483648 |