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 | 256 |
| 4 | 65536 |
| 5 | 16809856 |
| 6 | 4303323136 |
| 7 | 1101667434496 |
| 8 | 282026863230976 |
| 9 | 72198881268083456 |
| 10 | 18482913606768459776 |
| 11 | 4731625884430073102336 |
| 12 | 1211296226414098714198016 |
| 13 | 310091833962291289108054016 |