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 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 10 |
| 4 | 27 |
| 5 | 33 |
| 6 | 108 |
| 7 | 108 |
| 8 | 405 |
| 9 | 351 |
| 10 | 1458 |
| 11 | 1134 |
| 12 | 5103 |
| 13 | 3645 |
| 14 | 17496 |
| 15 | 11664 |
| 16 | 59049 |
| 17 | 37179 |
| 18 | 196830 |
| 19 | 118098 |
| 20 | 649539 |
| 21 | 373977 |
| 22 | 2125764 |
| 23 | 1180980 |
| 24 | 6908733 |
| 25 | 3720087 |
| 26 | 22320522 |
| 27 | 11691702 |
| 28 | 71744535 |