n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 4 |
5 | 8 |
6 | 38 |
7 | 206 |
8 | 1200 |
9 | 7244 |
10 | 55112 |
11 | 481108 |
12 | 4287064 |
13 | 42556692 |
14 | 458857096 |
15 | 5380649292 |
16 | 66715285656 |
17 | 886324380896 |
18 | 12515424567584 |
19 | 187185185162008 |
20 | 2950679797693984 |
21 | 48999725880417856 |
22 | 854663308052386560 |
23 | 15612043048565029376 |
24 | 298116231774768917120 |
[1,1,1,4,8,38,206,1200,7244,55112,481108,4287064, 42556692,458857096,5380649292,66715285656, 886324380896,12515424567584,187185185162008, 2950679797693984,48999725880417856, 854663308052386560,15612043048565029376, 298116231774768917120] |