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 | 269 |
| 3 | 269 |
| 4 | 3823 |
| 5 | 8539 |
| 6 | 729551 |
| 7 | 1416329 |
| 8 | 23592593 |
| 9 | 1478674861 |
| 10 | 20458458289 |
| 11 | 7558026467353 |
| 12 | 201008815538749 |