n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 4 |
4 | 25 |
5 | 174 |
6 | 1393 |
7 | 12536 |
8 | 125361 |
9 | 1378970 |
10 | 16547641 |
11 | 215119332 |
12 | 3011670649 |
13 | 45175059734 |
14 | 722800955745 |
15 | 12287616247664 |
16 | 221177092457953 |
17 | 4202364756701106 |
18 | 84047295134022121 |
19 | 1764993197814464540 |
20 | 38829850351918219881 |
21 | 893086558094119057262 |
[0,1,4,25,174,1393,12536,125361,1378970,16547641, 215119332,3011670649,45175059734,722800955745, 12287616247664,221177092457953,4202364756701106, 84047295134022121,1764993197814464540, 38829850351918219881,893086558094119057262] |