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 | 199 |
| 2 | 3559 |
| 3 | 12239 |
| 4 | 209359 |
| 5 | 4188719 |
| 6 | 2504902319 |
| 7 | 72642169519 |
| 8 | 528271743919 |
| 9 | 2324549427119 |
| 10 | 13106744139423334399919 |
| 11 | 2295148179742698933452799919 |
| 12 | 254451773522587035734629406212095999919 |
| 13 | 281238294844900882734503454910185471999919 |