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 | 3 |
| 2 | 3 |
| 3 | 3 |
| 4 | 7 |
| 5 | 7 |
| 6 | 37 |
| 7 | 37 |
| 8 | 163 |
| 9 | 671353 |
| 10 | 13243063 |
| 11 | 5906322013 |
| 12 | 12087247687 |
| 13 | 1523351345443 |
| 14 | 1523351345443 |
| 15 | 23631302781703 |