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 | 36 |
| 3 | 324 |
| 4 | 2880 |
| 5 | 25632 |
| 6 | 228096 |
| 7 | 2029824 |
| 8 | 18063360 |
| 9 | 160745472 |
| 10 | 1430470656 |
| 11 | 12729729024 |
| 12 | 113281597440 |
| 13 | 1008090611712 |
| 14 | 8970977673216 |
| 15 | 79832546279424 |
| 16 | 710428191621120 |