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 | 16 |
| 3 | 1216 |
| 4 | 157696 |
| 5 | 25317376 |
| 6 | 4543676416 |
| 7 | 873117515776 |
| 8 | 175715349692416 |
| 9 | 36562356662173696 |
| 10 | 7802094251017240576 |
| 11 | 1698089607837490610176 |
| 12 | 375493988522687218057216 |
| 13 | 84121868091432283370684416 |