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 | 3 |
| 2 | 18 |
| 3 | 243 |
| 4 | 5184 |
| 5 | 151875 |
| 6 | 5668704 |
| 7 | 257298363 |
| 8 | 13759414272 |
| 9 | 847288609443 |
| 10 | 59049000000000 |
| 11 | 4594736955793347 |
| 12 | 394865111526801408 |
| 13 | 37144672966729275363 |
| 14 | 3796313155316599873536 |
| 15 | 418886580596209716796875 |