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 | 13 |
| 2 | 251 |
| 3 | 4031 |
| 4 | 52017 |
| 5 | 652039 |
| 6 | 7746369 |
| 7 | 89721621 |
| 8 | 1019145113 |
| 9 | 11401770915 |
| 10 | 126048548239 |