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 | 4 |
| 3 | 6 |
| 4 | 49 |
| 5 | 195 |
| 6 | 3969 |
| 7 | 285516 |
| 8 | 22743361 |
| 9 | 3414837564 |
| 10 | 1467194393284 |
| 11 | 1549197261403648 |
| 12 | 3156509484479021584 |
| 13 | 11694530363878786782540 |
| 14 | 91853775938916496321710336 |