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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 25 |
| 6 | 9 |
| 7 | 2401 |
| 8 | 2048 |
| 9 | 59049 |
| 10 | 15625 |
| 11 | 214358881 |
| 12 | 248832 |
| 13 | 137858491849 |
| 14 | 564950498 |
| 15 | 21357421875 |
| 16 | 2199023255552 |
| 17 | 168377826559400929 |
| 18 | 282429536481 |
| 19 | 288441413567621167681 |
| 20 | 1600000000000000 |
| 21 | 1962371317204369449 |
| 22 | 11119834626984462962 |