n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 3 |
4 | 4 |
5 | 40 |
6 | 216 |
7 | 1603 |
8 | 13000 |
9 | 118872 |
10 | 1202880 |
11 | 13361403 |
12 | 161638764 |
13 | 2115684272 |
14 | 29792671832 |
15 | 449145795915 |
16 | 7217975402768 |
17 | 123180993414224 |
18 | 2224874726830656 |
19 | 42402252681323859 |
20 | 850380681002034900 |
21 | 17902407539998807896 |
22 | 394741856473979171608 |
23 | 9097740802923890621491 |
[1,0,0,3,4,40,216,1603,13000,118872,1202880, 13361403,161638764,2115684272,29792671832, 449145795915,7217975402768,123180993414224, 2224874726830656,42402252681323859, 850380681002034900,17902407539998807896, 394741856473979171608,9097740802923890621491] |