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 | 57 |
| 2 | 313 |
| 3 | 1667 |
| 4 | 9109 |
| 5 | 49872 |
| 6 | 273607 |
| 7 | 1501739 |
| 8 | 8244503 |
| 9 | 45265163 |
| 10 | 248529844 |
| 11 | 1364574377 |
| 12 | 7492353561 |
| 13 | 41137689397 |
| 14 | 225871759293 |
| 15 | 1240178072856 |
| 16 | 6809359068477 |
| 17 | 37387672585765 |
| 18 | 205281890979411 |
| 19 | 1127126987808309 |