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 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 11 |
| 6 | 15 |
| 7 | 17 |
| 8 | 153 |
| 9 | 169 |
| 10 | 273 |
| 11 | 317 |
| 12 | 373 |
| 13 | 923 |
| 14 | 1403 |
| 15 | 1969 |
| 16 | 2349 |
| 17 | 7809 |
| 18 | 10313 |
| 19 | 12291 |
| 20 | 24865 |
| 21 | 41289 |