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 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 14 |
| 6 | 69 |
| 7 | 965 |
| 8 | 66584 |
| 9 | 64253559 |
| 10 | 4278258972455 |
| 11 | 274893365303916717344 |
| 12 | 1176065006579831683931038116759519 |
| 13 | 323292467474902888912311701915651931811127805144397535 |