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 | 9 |
| 2 | 75 |
| 3 | 135 |
| 4 | 265 |
| 5 | 1383 |
| 6 | 6585 |
| 7 | 17251 |
| 8 | 165615 |
| 9 | 503111 |
| 10 | 856195 |