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 | 1 |
| 4 | 4 |
| 5 | 6 |
| 6 | 48 |
| 7 | 64 |
| 8 | 96 |
| 9 | 576 |
| 10 | 1728 |
| 11 | 13824 |
| 12 | 165888 |
| 13 | 1036800 |
| 14 | 9953280 |
| 15 | 119439360 |
| 16 | 297271296 |
| 17 | 134369280000 |
| 18 | 222953472000 |
| 19 | 75246796800 |
| 20 | 32105299968000 |
| 21 | 229323571200 |
| 22 | 568865783808000000 |
| 23 | 125150472437760000 |
| 24 | 6129819058176000 |