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 | 1 |
| 4 | 25 |
| 5 | 1 |
| 6 | 721 |
| 7 | 1 |
| 8 | 6721 |
| 9 | 181441 |
| 10 | 151201 |
| 11 | 1 |
| 12 | 203575681 |
| 13 | 1 |
| 14 | 121080961 |
| 15 | 108972864001 |
| 16 | 3491282995201 |
| 17 | 1 |
| 18 | 133541574566401 |
| 19 | 1 |
| 20 | 304119455447808001 |
| 21 | 212878925715456001 |
| 22 | 309744468633601 |
| 23 | 1 |
| 24 | 17665560315112008499201 |
| 25 | 646300418472124416000001 |
| 26 | 841941782922240001 |