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 | 5 |
| 2 | 7 |
| 3 | 11 |
| 4 | 13 |
| 5 | 23 |
| 6 | 83 |
| 7 | 103 |
| 8 | 127 |
| 9 | 137 |
| 10 | 227 |
| 11 | 809 |
| 12 | 1093 |
| 13 | 1571 |
| 14 | 4273 |
| 15 | 5333 |
| 16 | 16141 |
| 17 | 20627 |
| 18 | 41519 |
| 19 | 56813 |
| 20 | 111913 |