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 | 243 |
| 2 | 59049 |
| 3 | 3628696 |
| 4 | 84988435 |
| 5 | 1140963027 |
| 6 | 10676374380 |
| 7 | 76942621022 |
| 8 | 453969579904 |
| 9 | 2284206888340 |
| 10 | 10088688214569 |
| 11 | 39954771229458 |
| 12 | 144202872415543 |
| 13 | 480339235745630 |
| 14 | 1491693619175208 |
| 15 | 4354474074592966 |