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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 6 |
| 5 | 36 |
| 6 | 0 |
| 7 | 324 |
| 8 | 0 |
| 9 | 324 |
| 10 | 0 |
| 11 | 36 |
| 12 | 12096 |
| 13 | 46656 |
| 14 | 81648 |
| 15 | 93960 |
| 16 | 69984 |
| 17 | 40824 |
| 18 | 11664 |
| 19 | 5832 |
| 20 | 0 |
| 21 | 216 |
| 22 | 17927568 |
| 23 | 64105344 |
| 24 | 109524960 |
| 25 | 117863424 |
| 26 | 89474544 |
| 27 | 49828608 |
| 28 | 21352896 |
| 29 | 6718464 |
| 30 | 1854576 |
| 31 | 279936 |
| 32 | 69984 |
| 33 | 0 |
| 34 | 1296 |