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 | 13 |
| 2 | 637 |
| 3 | 31213 |
| 4 | 1529437 |
| 5 | 74942413 |
| 6 | 3672178237 |
| 7 | 179936733613 |
| 8 | 8816899947037 |
| 9 | 432028097404813 |
| 10 | 21169376772835837 |
| 11 | 1037299461868956013 |
| 12 | 50827673631578844637 |
| 13 | 2490556007947363387213 |
| 14 | 122037244389420805973437 |
| 15 | 5979824975081619492698413 |
| 16 | 293011423778999355142222237 |