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 | 2 |
| 2 | 4 |
| 3 | 16 |
| 4 | 256 |
| 5 | 364 |
| 6 | 1456 |
| 7 | 3276 |
| 8 | 13104 |
| 9 | 21600 |
| 10 | 23296 |
| 11 | 65536 |
| 12 | 209664 |
| 13 | 249984 |
| 14 | 367200 |
| 15 | 1285632 |
| 16 | 3110400 |
| 17 | 5963776 |
| 18 | 6596304 |
| 19 | 9749376 |
| 20 | 23046144 |
| 21 | 27216000 |
| 22 | 33022080 |
| 23 | 52876800 |
| 24 | 53673984 |
| 25 | 76639680 |
| 26 | 94370400 |
| 27 | 105540864 |
| 28 | 119992320 |
| 29 | 245765520 |
| 30 | 285405120 |
| 31 | 426037248 |