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 | 4 |
| 3 | 27 |
| 4 | 64 |
| 5 | 3125 |
| 6 | 288 |
| 7 | 823543 |
| 8 | 147456 |
| 9 | 4251528 |
| 10 | 460800 |
| 11 | 285311670611 |
| 12 | 111974400 |
| 13 | 302875106592253 |
| 14 | 3251404800 |
| 15 | 13436928000 |
| 16 | 106542032486400 |
| 17 | 827240261886336764177 |
| 18 | 1053455155200000 |
| 19 | 1978419655660313589123979 |
| 20 | 102395841085440000 |