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 | 7 |
| 1 | 31 |
| 2 | 127 |
| 3 | 487 |
| 4 | 1423 |
| 5 | 1303 |
| 6 | 2143 |
| 7 | 2647 |
| 8 | 4447 |
| 9 | 5527 |
| 10 | 5647 |
| 11 | 6703 |
| 12 | 5503 |
| 13 | 11383 |
| 14 | 8863 |
| 15 | 13687 |
| 16 | 13183 |
| 17 | 12007 |
| 18 | 22807 |
| 19 | 18127 |
| 20 | 21487 |
| 21 | 22303 |
| 22 | 29863 |
| 23 | 25303 |
| 24 | 27127 |