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 | 8 |
| 4 | 68 |
| 5 | 550 |
| 6 | 5404 |
| 7 | 54768 |
| 8 | 581868 |
| 9 | 6329407 |
| 10 | 70335294 |
| 11 | 794064734 |
| 12 | 9083306888 |
| 13 | 105021662154 |