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 | 1 |
| 2 | 3 |
| 3 | 44 |
| 4 | 1285 |
| 5 | 59963 |
| 6 | 4113244 |
| 7 | 389384029 |
| 8 | 48627012403 |
| 9 | 7743988554848 |
| 10 | 1531612782695209 |
| 11 | 368303149768896363 |
| 12 | 105818590347793426632 |