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) |
|---|---|
| 8 | 2520 |
| 9 | 30240 |
| 10 | 226800 |
| 11 | 1367520 |
| 12 | 7271880 |
| 13 | 35692800 |
| 14 | 165957792 |
| 15 | 742822080 |
| 16 | 3234711480 |
| 17 | 13803744864 |
| 18 | 58021888080 |
| 19 | 241116750624 |
| 20 | 993313349544 |
| 21 | 4064913201216 |
| 22 | 16549636147968 |
| 23 | 67112688842496 |
| 24 | 271323921459096 |
| 25 | 1094303232174240 |
| 26 | 4405390451382960 |
| 27 | 17709538489849440 |