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 | 25 |
| 2 | 51 |
| 3 | 91 |
| 4 | 107 |
| 5 | 145 |
| 6 | 651 |
| 7 | 1473 |
| 8 | 2145 |
| 9 | 5577 |
| 10 | 12457 |