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 | 4 |
| 2 | 15 |
| 3 | 57 |
| 4 | 765 |
| 5 | 1025 |
| 6 | 2097 |
| 7 | 4947 |
| 8 | 9189 |
| 9 | 103599 |
| 10 | 216927 |
| 11 | 4346128 |
| 12 | 1558269 |
| 13 | 1977777 |
| 14 | 208510373 |
| 15 | 14493123 |
| 16 | 493262541 |
| 17 | 144228033 |