n | a(n) |
---|---|
10 | 1 |
11 | 0 |
12 | 66 |
13 | 572 |
14 | 9009 |
15 | 132132 |
16 | 2122120 |
17 | 36056592 |
18 | 649062414 |
19 | 12332093488 |
20 | 246642054516 |
21 | 5179482792120 |
22 | 113948622073286 |
23 | 2620818306541512 |
24 | 62899639358957544 |
25 | 1572490983970669840 |
26 | 40884765583242727575 |
[1,0,66,572,9009,132132,2122120,36056592, 649062414,12332093488,246642054516,5179482792120, 113948622073286,2620818306541512, 62899639358957544,1572490983970669840, 40884765583242727575] |