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 | 3 |
| 2 | 5 |
| 3 | 27 |
| 4 | 89 |
| 5 | 1139 |
| 6 | 1219 |
| 7 | 1921 |
| 8 | 2155 |
| 9 | 5775 |
| 10 | 9047 |
| 11 | 12437 |
| 12 | 78785 |
| 13 | 105909 |
| 14 | 197559 |
| 15 | 1062657 |