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 | 60 |
| 2 | 1400 |
| 3 | 25200 |
| 4 | 17248000 |
| 5 | 7207200000 |
| 6 | 12713500800000 |
| 7 | 38118080000000 |
| 8 | 252957982717440000000 |
| 9 | 177399104762880000000 |
| 10 | 39217856135377920000000000 |
| 11 | 314173814535060480000000000 |
| 12 | 566078379029271972864000000000000 |
| 13 | 8188688361066909696000000000000 |
| 14 | 3391339339748110516021960704000000000000 |