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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 7 |
| 5 | 47 |
| 6 | 181 |
| 7 | 1307 |
| 8 | 2503 |
| 9 | 40973 |
| 10 | 46833 |
| 11 | 109177 |
| 12 | 2885373 |
| 13 | 11744311 |
| 14 | 192968969 |
| 15 | 899988745 |