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 | 132 |
| 2 | 264 |
| 3 | 396 |
| 4 | 35964 |
| 5 | 4799520 |
| 6 | 839991600 |
| 7 | 1511984880 |
| 8 | 332639667360 |
| 9 | 86486391351360 |
| 10 | 151351184864880 |
| 11 | 46126079538739200 |
| 12 | 27427196132572803840 |
| 13 | 18050376958194962304000 |
| 14 | 7828706350001712936499200 |
| 15 | 8540406927274595930726400 |