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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 81 |
| 3 | 19683 |
| 4 | 43046721 |
| 5 | 847288609443 |
| 6 | 150094635296999121 |
| 7 | 239299329230617529590083 |
| 8 | 3433683820292512484657849089281 |
| 9 | 443426488243037769948249630619149892803 |