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 | 523 |
| 3 | 22193 |
| 4 | 1442173 |
| 5 | 5521819 |
| 6 | 354963229 |
| 7 | 881160173 |
| 8 | 881160173 |
| 9 | 441586802467 |
| 10 | 3085029222449 |