n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 5 |
4 | 6 |
5 | 24 |
6 | 40 |
7 | 120 |
8 | 250 |
9 | 640 |
10 | 1452 |
11 | 3600 |
12 | 8510 |
13 | 20880 |
14 | 50460 |
15 | 124024 |
16 | 303750 |
17 | 750120 |
18 | 1853120 |
19 | 4600200 |
20 | 11437548 |
21 | 28527320 |
22 | 71281800 |
23 | 178526880 |
24 | 447893250 |
25 | 1125750120 |
26 | 2833844040 |
27 | 7144449920 |
28 | 18036271740 |
29 | 45591631800 |
30 | 115381449692 |
31 | 292329067800 |
32 | 741410192250 |
[1,0,5,6,24,40,120,250,640,1452,3600,8510,20880, 50460,124024,303750,750120,1853120,4600200, 11437548,28527320,71281800,178526880,447893250, 1125750120,2833844040,7144449920,18036271740, 45591631800,115381449692,292329067800, 741410192250] |