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 | 2 |
| 2 | 3 |
| 3 | 13 |
| 4 | 3251 |
| 5 | 16777729 |
| 6 | 387421219 |
| 7 | 11112006825560761 |
| 8 | 443426488243037769948249630619149912487 |
| 9 | 1075911801979993982060429252856123779115487368830416064665177 |