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 | 1 |
| 2 | 3 |
| 3 | 27 |
| 4 | 189 |
| 5 | 1701 |
| 6 | 46656 |
| 7 | 606528 |
| 8 | 8957952 |
| 9 | 387420489 |
| 10 | 7360989291 |
| 11 | 154580775111 |
| 12 | 8916100448256 |
| 13 | 222902511206400 |