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 | 6 |
| 3 | 60 |
| 4 | 1080 |
| 5 | 6552 |
| 6 | 36720 |
| 7 | 47520 |
| 8 | 87360 |
| 9 | 222768 |
| 10 | 288288 |
| 11 | 8173440 |
| 12 | 49585536 |
| 13 | 203558400 |
| 14 | 683289600 |
| 15 | 920387520 |
| 16 | 4201148160 |
| 17 | 25486965504 |
| 18 | 556121548800 |
| 19 | 1610457666048 |
| 20 | 3633511924224 |
| 21 | 4399770343643136 |
| 22 | 6075071799091200 |
| 23 | 9926754576979968 |
| 24 | 27220195859304960 |
| 25 | 66800080530869760 |
| 26 | 629720915643477504 |