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 | 19 |
| 1 | 10228 |
| 2 | 15569256417 |
| 3 | 5742397643169488579854258 |
| 4 | 36681813266165915713665394441869800619098139628586701684547 |