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 | 64 |
| 2 | 2016 |
| 3 | 41664 |
| 4 | 635376 |
| 5 | 7624512 |
| 6 | 74974368 |
| 7 | 621216192 |
| 8 | 4426165368 |
| 9 | 27540584512 |
| 10 | 151473214816 |
| 11 | 743595781824 |
| 12 | 3284214703056 |
| 13 | 13136858812224 |
| 14 | 47855699958816 |
| 15 | 159518999862720 |
| 16 | 488526937079580 |
| 17 | 1379370175283520 |
| 18 | 3601688791018080 |