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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 2 |
| 3 | 5 |
| 4 | 20 |
| 5 | 96 |
| 6 | 581 |
| 7 | 4079 |
| 8 | 31079 |
| 9 | 247169 |
| 10 | 2018826 |
| 11 | 16771564 |
| 12 | 141113504 |
| 13 | 1199154541 |
| 14 | 10274686867 |