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 | 0 |
| 2 | 256 |
| 3 | 3584 |
| 4 | 21504 |
| 5 | 84480 |
| 6 | 256256 |
| 7 | 652288 |
| 8 | 1462272 |
| 9 | 2976768 |
| 10 | 5617920 |
| 11 | 9974272 |
| 12 | 16839680 |
| 13 | 27256320 |
| 14 | 42561792 |
| 15 | 64440320 |
| 16 | 94978048 |
| 17 | 136722432 |
| 18 | 192745728 |
| 19 | 266712576 |
| 20 | 362951680 |
| 21 | 486531584 |
| 22 | 643340544 |
| 23 | 840170496 |
| 24 | 1084805120 |
| 25 | 1386112000 |
| 26 | 1754138880 |
| 27 | 2200214016 |