n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 6 |
4 | 28 |
5 | 160 |
6 | 1056 |
7 | 7784 |
8 | 63568 |
9 | 569664 |
10 | 5542240 |
11 | 58038112 |
12 | 650045760 |
13 | 7746901760 |
14 | 97790608384 |
15 | 1302349549440 |
16 | 18235836899584 |
17 | 267663541270528 |
18 | 4107395264113152 |
19 | 65739857693144576 |
20 | 1095095457262013440 |
21 | 18949711553467957248 |
22 | 340036076121127395328 |
[1,0,2,6,28,160,1056,7784,63568,569664,5542240, 58038112,650045760,7746901760,97790608384, 1302349549440,18235836899584,267663541270528, 4107395264113152,65739857693144576, 1095095457262013440,18949711553467957248, 340036076121127395328] |