n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 3 |
4 | 16 |
5 | 30 |
6 | 252 |
7 | 399 |
8 | 4672 |
9 | 8100 |
10 | 111200 |
11 | 193006 |
12 | 3279888 |
13 | 5631093 |
14 | 114137072 |
15 | 196030350 |
16 | 4600308224 |
17 | 7873377297 |
18 | 210745840824 |
19 | 359490499457 |
20 | 10808589776800 |
21 | 18389567969010 |
22 | 613522956193532 |
23 | 1041400845949218 |
24 | 38179982045681856 |
25 | 64675343605547500 |
26 | 2584515863960831060 |
[1,0,2,3,16,30,252,399,4672,8100,111200,193006, 3279888,5631093,114137072,196030350,4600308224, 7873377297,210745840824,359490499457, 10808589776800,18389567969010,613522956193532, 1041400845949218,38179982045681856, 64675343605547500,2584515863960831060] |