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 | 9 |
| 3 | 657 |
| 4 | 384345 |
| 5 | 1799118945 |
| 6 | 67375205371305 |
| 7 | 20185139902805378865 |
| 8 | 48378633136349277767794425 |
| 9 | 927610024989668734297857360967425 |
| 10 | 142287668466497494704440569679875994730825 |
| 11 | 174605966461872393482359052970987514818406771638225 |