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 | 3 |
| 2 | 54 |
| 3 | 1232 |
| 4 | 27246 |
| 5 | 568107 |
| 6 | 11231300 |
| 7 | 212819499 |
| 8 | 3903149379 |
| 9 | 69818587635 |
| 10 | 1225169731998 |