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 | 16038 |
| 4 | 352836 |
| 5 | 7762392 |
| 6 | 170772624 |
| 7 | 3756997728 |
| 8 | 82653950016 |
| 9 | 1818386900352 |
| 10 | 40004511807744 |
| 11 | 880099259770368 |
| 12 | 19362183714948096 |
| 13 | 425968041728858112 |
| 14 | 9371296918034878464 |
| 15 | 206168532196767326208 |