n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 6 |
4 | 50 |
5 | 379 |
6 | 3023 |
7 | 26193 |
8 | 248092 |
9 | 2565080 |
10 | 28836332 |
11 | 350847628 |
12 | 4598548392 |
13 | 64645657608 |
14 | 970762440048 |
15 | 15514297672464 |
16 | 262985728086144 |
17 | 4713910512720768 |
18 | 89097880064868864 |
19 | 1771270259515278336 |
20 | 36950742840576268800 |
21 | 807153610378856716800 |
22 | 18426068050750227993600 |
[0,0,6,50,379,3023,26193,248092,2565080,28836332, 350847628,4598548392,64645657608,970762440048, 15514297672464,262985728086144,4713910512720768, 89097880064868864,1771270259515278336, 36950742840576268800,807153610378856716800, 18426068050750227993600] |