n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 2 |
5 | 5 |
6 | 20 |
7 | 101 |
8 | 743 |
9 | 7350 |
10 | 91763 |
11 | 1344782 |
12 | 22160335 |
13 | 401278984 |
14 | 7885687604 |
15 | 166870266608 |
16 | 3781101495300 |
[0,0,0,1,2,5,20,101,743,7350,91763,1344782, 22160335,401278984,7885687604,166870266608, 3781101495300] |