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 | 28 |
| 2 | 496 |
| 3 | 8128 |
| 4 | 950976 |
| 5 | 2178540 |
| 6 | 33550336 |
| 7 | 142990848 |
| 8 | 301953024 |
| 9 | 459818240 |
| 10 | 675347400 |
| 11 | 714954240 |
| 12 | 995248800 |
| 13 | 1379454720 |
| 14 | 2701389600 |
| 15 | 3288789504 |
| 16 | 6720569856 |
| 17 | 8589869056 |
| 18 | 10200236032 |
| 19 | 14254365440 |
| 20 | 30600708096 |
| 21 | 42763096320 |
| 22 | 43861478400 |
| 23 | 66433720320 |
| 24 | 71271827200 |