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 | 2 |
| 3 | 48 |
| 4 | 24 |
| 5 | 180 |
| 6 | 300 |
| 7 | 17640 |
| 8 | 20160 |
| 9 | 22680 |
| 10 | 25200 |
| 11 | 166320 |
| 12 | 83160 |
| 13 | 4324320 |
| 14 | 9369360 |
| 15 | 2162160 |
| 16 | 7207200 |
| 17 | 98017920 |
| 18 | 49008960 |
| 19 | 2793510720 |
| 20 | 2095133040 |
| 21 | 1396755360 |
| 22 | 698377680 |
| 23 | 1847208963600 |
| 24 | 1927522396800 |
| 25 | 2007835830000 |
| 26 | 2088149263200 |
| 27 | 2168462696400 |
| 28 | 2248776129600 |