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 | 5 |
| 2 | 17 |
| 3 | 73 |
| 4 | 127 |
| 5 | 313 |
| 6 | 1453 |
| 7 | 22861 |
| 8 | 28123 |
| 9 | 296713 |
| 10 | 309481 |
| 11 | 2063947162127 |