n | a(n) |
---|---|
4 | 6 |
5 | 20 |
6 | 180 |
7 | 1106 |
8 | 9292 |
9 | 82980 |
10 | 831545 |
11 | 9139482 |
12 | 109595496 |
13 | 1423490744 |
14 | 19911182207 |
15 | 298408841160 |
16 | 4770598226296 |
17 | 81037124739588 |
18 | 1457607971046492 |
19 | 27675791180024802 |
20 | 553166885187641670 |
21 | 11609691036091870428 |
22 | 255273744004170486155 |
23 | 5868308906885934514178 |
[6,20,180,1106,9292,82980,831545,9139482, 109595496,1423490744,19911182207,298408841160, 4770598226296,81037124739588,1457607971046492, 27675791180024802,553166885187641670, 11609691036091870428,255273744004170486155, 5868308906885934514178] |