n | a(n) |
---|---|
4 | 1 |
5 | 10 |
6 | 66 |
7 | 364 |
8 | 1820 |
9 | 8568 |
10 | 38760 |
11 | 170544 |
12 | 735471 |
13 | 3124550 |
14 | 13123110 |
15 | 54627300 |
16 | 225792840 |
17 | 927983760 |
18 | 3796297200 |
19 | 15471286560 |
20 | 62852101650 |
21 | 254661927156 |
22 | 1029530696964 |
23 | 4154246671960 |
24 | 16735679449896 |
25 | 67327446062800 |
26 | 270533919634160 |
27 | 1085929983159840 |
28 | 4355031703297275 |
[1,10,66,364,1820,8568,38760,170544,735471, 3124550,13123110,54627300,225792840,927983760, 3796297200,15471286560,62852101650,254661927156, 1029530696964,4154246671960,16735679449896, 67327446062800,270533919634160,1085929983159840, 4355031703297275] |