n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 2 |
4 | 0 |
5 | 3 |
6 | 6 |
7 | 0 |
8 | 0 |
9 | 20 |
10 | 24 |
11 | 0 |
12 | 0 |
13 | 15 |
14 | 130 |
15 | 120 |
16 | 0 |
17 | 0 |
18 | 0 |
19 | 210 |
20 | 924 |
21 | 720 |
22 | 0 |
23 | 0 |
24 | 0 |
25 | 105 |
26 | 2380 |
27 | 7308 |
28 | 5040 |
29 | 0 |
30 | 0 |
31 | 0 |
32 | 0 |
33 | 2520 |
34 | 26432 |
35 | 64224 |
36 | 40320 |
37 | 0 |
38 | 0 |
39 | 0 |
40 | 0 |
41 | 945 |
42 | 44100 |
43 | 303660 |
44 | 623376 |
45 | 362880 |
46 | 0 |
47 | 0 |
48 | 0 |
49 | 0 |
50 | 0 |
51 | 34650 |
52 | 705320 |
53 | 3678840 |
54 | 6636960 |
55 | 3628800 |
[1,0,2,0,3,6,0,0,20,24,0,0,15,130,120,0,0,0,210, 924,720,0,0,0,105,2380,7308,5040,0,0,0,0,2520, 26432,64224,40320,0,0,0,0,945,44100,303660,623376, 362880,0,0,0,0,0,34650,705320,3678840,6636960, 3628800] |