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 | 5 |
| 4 | 7 |
| 5 | 43 |
| 6 | 109 |
| 7 | 10987 |
| 8 | 76543 |
| 9 | 10987654321098765432109876543210987 |
| 10 | 4321098765432109876543210987654321098765432109876543210987654321 |