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 | 5 |
| 4 | 16 |
| 5 | 51 |
| 6 | 201 |
| 7 | 877 |
| 8 | 4443 |
| 9 | 25284 |
| 10 | 161698 |
| 11 | 1145508 |
| 12 | 8910291 |
| 13 | 75373563 |
| 14 | 687950735 |
| 15 | 6727985390 |