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 | 0 |
| 2 | 5 |
| 3 | 33 |
| 4 | 265 |
| 5 | 2087 |
| 6 | 17203 |
| 7 | 146439 |
| 8 | 1274154 |
| 9 | 11271147 |
| 10 | 101049993 |
| 11 | 915748570 |
| 12 | 8372464236 |
| 13 | 77114396969 |