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 | 3 |
| 5 | 5 |
| 6 | 11 |
| 7 | 101 |
| 8 | 151 |
| 9 | 757 |
| 10 | 797 |
| 11 | 72727 |
| 12 | 3485843 |
| 13 | 7362637 |
| 14 | 753535357 |
| 15 | 32792329723 |
| 16 | 1644209024461 |
| 17 | 9600458540069 |
| 18 | 125319848913521 |
| 19 | 164957666759461 |