n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 1 |
4 | 6 |
5 | 48 |
6 | 370 |
7 | 3341 |
8 | 33966 |
9 | 393468 |
10 | 5111100 |
11 | 73753685 |
12 | 1170469192 |
13 | 20263758984 |
14 | 380047816638 |
15 | 7676106093049 |
16 | 166114206920706 |
17 | 3834434320842720 |
18 | 94042629507775794 |
19 | 2442147034668044933 |
20 | 66942194905680941268 |
21 | 1931543452344523778392 |
22 | 58519191359156026158522 |
[0,0,1,6,48,370,3341,33966,393468,5111100, 73753685,1170469192,20263758984,380047816638, 7676106093049,166114206920706,3834434320842720, 94042629507775794,2442147034668044933, 66942194905680941268,1931543452344523778392, 58519191359156026158522] |