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 | 27 |
| 2 | 729 |
| 3 | 12167 |
| 4 | 19683 |
| 5 | 68921 |
| 6 | 148877 |
| 7 | 185193 |
| 8 | 328509 |
| 9 | 658503 |
| 10 | 704969 |
| 11 | 970299 |
| 12 | 1030301 |
| 13 | 1367631 |
| 14 | 2248091 |
| 15 | 3581577 |
| 16 | 5000211 |
| 17 | 9663597 |
| 18 | 15813251 |
| 19 | 17779581 |
| 20 | 19034163 |