n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 2 |
5 | 10 |
6 | 28 |
7 | 116 |
8 | 388 |
9 | 1588 |
10 | 5960 |
11 | 25168 |
12 | 102856 |
13 | 453608 |
14 | 1985008 |
15 | 9163360 |
16 | 42486128 |
17 | 205065136 |
18 | 1000056928 |
19 | 5035366208 |
20 | 25689681760 |
21 | 134588839648 |
22 | 715328668736 |
23 | 3889568161408 |
24 | 21463055829568 |
25 | 120839175460160 |
26 | 690344333849728 |
27 | 4015753752384256 |
[0,0,0,1,2,10,28,116,388,1588,5960,25168,102856, 453608,1985008,9163360,42486128,205065136, 1000056928,5035366208,25689681760,134588839648, 715328668736,3889568161408,21463055829568, 120839175460160,690344333849728,4015753752384256] |