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 | 2 |
| 3 | 32 |
| 4 | 528 |
| 5 | 131328 |
| 6 | 22377984 |
| 7 | 91628068864 |
| 8 | 187650529822720 |
| 9 | 12297831583666176000 |
| 10 | 322380224569805856440320 |
| 11 | 338040160454396241027914530816 |
| 12 | 118153599638221082814732598131032064 |
| 13 | 1982288462105132553530631056140022239461376 |