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 | 15 |
| 4 | 17 |
| 5 | 19 |
| 6 | 51 |
| 7 | 73 |
| 8 | 89 |
| 9 | 131 |
| 10 | 153 |
| 11 | 245 |
| 12 | 333 |
| 13 | 441 |
| 14 | 463 |
| 15 | 825 |
| 16 | 1771 |
| 17 | 2027 |
| 18 | 9157 |
| 19 | 10875 |
| 20 | 20515 |