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 | 1 |
| 2 | 4 |
| 3 | 8 |
| 4 | 25 |
| 5 | 121 |
| 6 | 729 |
| 7 | 5041 |
| 8 | 40401 |
| 9 | 363609 |
| 10 | 3629025 |
| 11 | 39917124 |
| 12 | 479040769 |
| 13 | 6227103744 |
| 14 | 87178467600 |
| 15 | 1307674583296 |
| 16 | 20922793332736 |
| 17 | 355687454263684 |
| 18 | 6402373820077225 |
| 19 | 121645100663836929 |
| 20 | 2432902009335560361 |