n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 2 |
4 | 12 |
5 | 50 |
6 | 184 |
7 | 686 |
8 | 2996 |
9 | 16642 |
10 | 110328 |
11 | 784190 |
12 | 5645876 |
13 | 40685762 |
14 | 296458344 |
15 | 2226254766 |
16 | 17564381332 |
17 | 147289101090 |
18 | 1312394060536 |
19 | 12305546886398 |
20 | 119906479624084 |
21 | 1202273551045474 |
22 | 12341175064817576 |
23 | 129582557972751918 |
24 | 1394497073432776756 |
[1,0,0,2,12,50,184,686,2996,16642,110328,784190, 5645876,40685762,296458344,2226254766,17564381332, 147289101090,1312394060536,12305546886398, 119906479624084,1202273551045474, 12341175064817576,129582557972751918, 1394497073432776756] |