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 | 6 |
| 2 | 48 |
| 3 | 528 |
| 4 | 7920 |
| 5 | 149856 |
| 6 | 3169248 |
| 7 | 77046528 |
| 8 | 2231209728 |
| 9 | 71938507776 |
| 10 | 2446325534208 |
| 11 | 92886269386752 |
| 12 | 3995799894239232 |
| 13 | 180512165153832960 |
| 14 | 8443006907441565696 |
| 15 | 440473891771339603968 |
| 16 | 25125124946211876962304 |
| 17 | 1444211070518302580146176 |