n | a(n) |
---|---|
3 | 1 |
4 | 12 |
5 | 54 |
6 | 188 |
7 | 636 |
8 | 2168 |
9 | 7556 |
10 | 26826 |
11 | 96724 |
12 | 353390 |
13 | 1305126 |
14 | 4864450 |
15 | 18272804 |
16 | 69103526 |
17 | 262871644 |
18 | 1005137688 |
19 | 3860909698 |
20 | 14890903690 |
21 | 57641869140 |
22 | 223864731680 |
23 | 872028568182 |
24 | 3406103773674 |
25 | 13337263822236 |
[1,12,54,188,636,2168,7556,26826,96724,353390, 1305126,4864450,18272804,69103526,262871644, 1005137688,3860909698,14890903690,57641869140, 223864731680,872028568182,3406103773674, 13337263822236] |