n | a(n) |
---|---|
5 | 20 |
6 | 64 |
7 | 336 |
8 | 1160 |
9 | 5896 |
10 | 24652 |
11 | 117628 |
12 | 531136 |
13 | 2559552 |
14 | 12142320 |
15 | 59416808 |
16 | 290915560 |
17 | 1449601452 |
18 | 7269071976 |
19 | 36877764000 |
20 | 188484835300 |
21 | 972003964976 |
22 | 5049059855636 |
23 | 26423287218612 |
24 | 139205945578944 |
[20,64,336,1160,5896,24652,117628,531136,2559552, 12142320,59416808,290915560,1449601452,7269071976, 36877764000,188484835300,972003964976, 5049059855636,26423287218612,139205945578944] |