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) |
|---|---|
| 0 | 11 |
| 1 | 10 |
| 2 | 17 |
| 3 | 21 |
| 4 | 23 |
| 5 | 31 |
| 6 | 43 |
| 7 | 167 |
| 8 | 6383 |
| 9 | 31741 |
| 10 | 52112213 |
| 11 | 37549127743 |
| 12 | 36777947021270771 |
| 13 | 504837176634758950812127 |