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 | 324 |
| 2 | 9216 |
| 3 | 11664 |
| 4 | 24336 |
| 5 | 57600 |
| 6 | 147456 |
| 7 | 331776 |
| 8 | 746496 |
| 9 | 1679616 |
| 10 | 3873024 |
| 11 | 8856576 |
| 12 | 20358144 |
| 13 | 46457856 |
| 14 | 106502400 |
| 15 | 243360000 |
| 16 | 557715456 |
| 17 | 1275346944 |
| 18 | 2921186304 |
| 19 | 6682081536 |
| 20 | 15300700416 |
| 21 | 35007906816 |
| 22 | 80147874816 |
| 23 | 183403201536 |