n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 6 |
5 | 3 |
6 | 1 |
7 | 142 |
8 | 11682 |
9 | 310536 |
10 | 3460725 |
11 | 19870590 |
12 | 65886660 |
13 | 133585200 |
14 | 168399000 |
15 | 128898000 |
16 | 54885600 |
17 | 9979200 |
18 | 1 |
19 | 11251320 |
20 | 4825713121719 |
21 | 48019143606137456 |
22 | 60392840368910627325 |
[1,1,4,6,3,1,142,11682,310536,3460725,19870590, 65886660,133585200,168399000,128898000,54885600, 9979200,1,11251320,4825713121719, 48019143606137456,60392840368910627325] |