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) |
|---|---|
| 6 | 3 |
| 7 | 32 |
| 8 | 225 |
| 9 | 1320 |
| 10 | 7007 |
| 11 | 34944 |
| 12 | 167076 |
| 13 | 775200 |
| 14 | 3517470 |
| 15 | 15690048 |
| 16 | 69052555 |
| 17 | 300638520 |
| 18 | 1297398375 |
| 19 | 5557977600 |
| 20 | 23663585880 |
| 21 | 100222246080 |
| 22 | 422559514170 |
| 23 | 1774647576000 |
| 24 | 7427639542050 |
| 25 | 30994292561232 |
| 26 | 128989359164358 |