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 | 3 |
| 2 | 11 |
| 3 | 131 |
| 4 | 1429 |
| 5 | 77141 |
| 6 | 3847271 |
| 7 | 117048931 |
| 8 | 22917541219 |
| 9 | 1771365487891 |
| 10 | 140734085123059 |
| 11 | 14159733947566481 |