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 | 9 |
| 2 | 27 |
| 3 | 81 |
| 4 | 129 |
| 5 | 243 |
| 6 | 387 |
| 7 | 729 |
| 8 | 1161 |
| 9 | 1299 |
| 10 | 1329 |
| 11 | 1849 |
| 12 | 2187 |
| 13 | 3483 |
| 14 | 3897 |
| 15 | 3987 |
| 16 | 5547 |
| 17 | 6561 |
| 18 | 10029 |
| 19 | 10299 |
| 20 | 10449 |
| 21 | 11691 |
| 22 | 11961 |
| 23 | 16641 |
| 24 | 18619 |
| 25 | 19049 |
| 26 | 19683 |
| 27 | 30087 |
| 28 | 30897 |
| 29 | 31347 |
| 30 | 35073 |
| 31 | 35883 |
| 32 | 49923 |
| 33 | 55857 |
| 34 | 57147 |
| 35 | 59049 |
| 36 | 79507 |
| 37 | 90261 |
| 38 | 92691 |