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 | 3 |
| 3 | 13 |
| 4 | 61 |
| 5 | 241 |
| 6 | 1051 |
| 7 | 5041 |
| 8 | 20161 |
| 9 | 91081 |
| 10 | 392041 |
| 11 | 1681681 |
| 12 | 6530173 |
| 13 | 27168961 |
| 14 | 115590931 |