n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 3 |
5 | 24 |
6 | 177 |
7 | 1347 |
8 | 10467 |
9 | 82029 |
10 | 644808 |
11 | 5073915 |
12 | 39939900 |
13 | 314427960 |
14 | 2475438408 |
15 | 19488960504 |
16 | 153435934587 |
17 | 1207997701872 |
18 | 9510543548457 |
19 | 74876345104299 |
20 | 589500202673403 |
21 | 4641125238026805 |
22 | 36539501601385200 |
23 | 287674887310843395 |
24 | 2264859596198883588 |
[0,0,0,0,3,24,177,1347,10467,82029,644808,5073915, 39939900,314427960,2475438408,19488960504, 153435934587,1207997701872,9510543548457, 74876345104299,589500202673403,4641125238026805, 36539501601385200,287674887310843395, 2264859596198883588] |