n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 2 |
5 | 6 |
6 | 22 |
7 | 110 |
8 | 792 |
9 | 7805 |
10 | 97546 |
11 | 1435720 |
12 | 23780814 |
13 | 432757568 |
14 | 8542471494 |
15 | 181492137812 |
16 | 4127077143862 |
[1,0,0,1,2,6,22,110,792,7805,97546,1435720, 23780814,432757568,8542471494,181492137812, 4127077143862] |