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 | 7 |
| 3 | 19 |
| 4 | 31 |
| 5 | 107 |
| 6 | 127 |
| 7 | 607 |
| 8 | 1279 |
| 9 | 2203 |
| 10 | 4423 |
| 11 | 86243 |
| 12 | 110503 |
| 13 | 216091 |
| 14 | 756839 |
| 15 | 1257787 |
| 16 | 20996011 |
| 17 | 24036583 |
| 18 | 25964951 |
| 19 | 37156667 |