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 | 7 |
| 2 | 19 |
| 3 | 31 |
| 4 | 127 |
| 5 | 607 |
| 6 | 1279 |
| 7 | 2203 |
| 8 | 4423 |
| 9 | 110503 |
| 10 | 216091 |
| 11 | 1257787 |
| 12 | 20996011 |
| 13 | 24036583 |