n | a(n) |
---|---|
9 | 1 |
10 | 40 |
11 | 946 |
12 | 17296 |
13 | 270725 |
14 | 3819816 |
15 | 50063860 |
16 | 621216192 |
17 | 7392009768 |
18 | 85113005120 |
19 | 954526728530 |
20 | 10477677064400 |
21 | 112992892764570 |
22 | 1200635647008336 |
23 | 12599288291657880 |
24 | 130815226545884704 |
[1,40,946,17296,270725,3819816,50063860,621216192, 7392009768,85113005120,954526728530, 10477677064400,112992892764570,1200635647008336, 12599288291657880,130815226545884704] |