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 | 13 |
| 3 | 131 |
| 4 | 149 |
| 5 | 1699 |
| 6 | 14221 |
| 7 | 35201 |
| 8 | 126037 |
| 9 | 371669 |
| 10 | 1264699 |