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 | 36 |
| 4 | 144 |
| 5 | 21609 |
| 6 | 194481 |
| 7 | 65804544 |
| 8 | 1052872704 |
| 9 | 633623960025 |
| 10 | 15840599000625 |
| 11 | 14897346862777344 |
| 12 | 536304487059984384 |
| 13 | 726332080998489123249 |
| 14 | 35590271968925967039201 |
| 15 | 65608418035212856848285696 |