n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 8 |
3 | 32 |
4 | 144 |
5 | 672 |
6 | 3264 |
7 | 16256 |
8 | 82688 |
9 | 427520 |
10 | 2240512 |
11 | 11874304 |
12 | 63533056 |
13 | 342712320 |
14 | 1861779456 |
15 | 10176823296 |
16 | 55932813312 |
17 | 308907737088 |
18 | 1713473323008 |
19 | 9541666209792 |
20 | 53322206674944 |
21 | 298943898451968 |
[1,2,8,32,144,672,3264,16256,82688,427520,2240512, 11874304,63533056,342712320,1861779456, 10176823296,55932813312,308907737088, 1713473323008,9541666209792,53322206674944, 298943898451968] |