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) |
|---|---|
| 0 | 2 |
| 1 | 4 |
| 2 | 16 |
| 3 | 28 |
| 4 | 28 |
| 5 | 112 |
| 6 | 92 |
| 7 | 368 |
| 8 | 28 |
| 9 | 112 |
| 10 | 448 |
| 11 | 1792 |
| 12 | 7168 |
| 13 | 28672 |
| 14 | 22012 |
| 15 | 88048 |
| 16 | 352192 |
| 17 | 667324 |
| 18 | 1186396 |
| 19 | 1779772 |
| 20 | 1187452 |
| 21 | 4749808 |
| 22 | 18999232 |
| 23 | 28543804 |
| 24 | 19268956 |
| 25 | 77075824 |
| 26 | 308303296 |
| 27 | 473963068 |
| 28 | 377352028 |
| 29 | 1509408112 |