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) |
|---|---|
| 2 | 1 |
| 3 | 1 |
| 4 | 27 |
| 5 | 1 |
| 6 | 46656 |
| 7 | 1 |
| 8 | 823543 |
| 9 | 256 |
| 10 | 16777216 |
| 11 | 1 |
| 12 | 18446744073709551616 |
| 13 | 1 |
| 14 | 10000000000 |
| 15 | 387420489 |
| 16 | 437893890380859375 |
| 17 | 1 |
| 18 | 5842587018385982521381124421 |
| 19 | 1 |
| 20 | 341427877364219557396646723584 |