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 | 42 |
| 2 | 1764 |
| 3 | 14406 |
| 4 | 117649 |
| 5 | 524104 |
| 6 | 2334784 |
| 7 | 7513176 |
| 8 | 24176889 |
| 9 | 63380130 |
| 10 | 166152100 |
| 11 | 377999250 |
| 12 | 859955625 |
| 13 | 1762784400 |
| 14 | 3613452544 |
| 15 | 6837439440 |
| 16 | 12937925025 |
| 17 | 22975807530 |
| 18 | 40801576036 |
| 19 | 68811074046 |
| 20 | 116048554281 |
| 21 | 187501438872 |