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 | 5 |
| 3 | 13 |
| 4 | 193 |
| 5 | 449 |
| 6 | 114689 |
| 7 | 1811939329 |
| 8 | 2434970217729660813313 |
| 9 | 4943727411754159833089 |
| 10 | 6731298963614255244763987969 |
| 11 | 2388456554926020709124028311441244161 |