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 | 59 |
| 5 | 663 |
| 6 | 10609 |
| 7 | 225219 |
| 8 | 6057298 |
| 9 | 199290037 |
| 10 | 7805646133 |
| 11 | 356263294786 |
| 12 | 18626811747385 |