n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 4 |
3 | 12 |
4 | 128 |
5 | 16240 |
6 | 263721216 |
7 | 69548879504781056 |
8 | 4837046640370554355727482727956480 |
9 | 23397020201120067002755280700388456275000098577861376610994277515264 |
[0,2,4,12,128,16240,263721216,69548879504781056, 4837046640370554355727482727956480, 23397020201120067002755280700388456275000098577861\ 376610994277515264] |