n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 120 |
6 | 720 |
7 | 2940 |
8 | 10080 |
9 | 31248 |
10 | 90720 |
11 | 251460 |
12 | 673200 |
13 | 1753752 |
14 | 4468464 |
15 | 11176620 |
16 | 27518400 |
17 | 66838560 |
18 | 160422336 |
19 | 381014676 |
20 | 896518800 |
21 | 2091893160 |
22 | 4844402640 |
23 | 11142147324 |
24 | 25467789600 |
25 | 57881367600 |
26 | 130862253600 |
27 | 294440105700 |
28 | 659545876080 |
[0,0,0,0,0,120,720,2940,10080,31248,90720,251460, 673200,1753752,4468464,11176620,27518400,66838560, 160422336,381014676,896518800,2091893160, 4844402640,11142147324,25467789600,57881367600, 130862253600,294440105700,659545876080] |