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 | 6 |
| 2 | 38 |
| 3 | 320 |
| 4 | 2819 |
| 5 | 25668 |
| 6 | 237586 |
| 7 | 2224574 |
| 8 | 21007948 |
| 9 | 199725336 |
| 10 | 1908845614 |
| 11 | 18321586810 |
| 12 | 176478166845 |