n | a(n) |
---|---|
3 | 1 |
4 | 18 |
5 | 215 |
6 | 2475 |
7 | 28294 |
8 | 340116 |
9 | 4335596 |
10 | 57773700 |
11 | 831170736 |
12 | 12532005288 |
13 | 201002619168 |
14 | 3401283910752 |
15 | 60929911689984 |
16 | 1143429812726400 |
17 | 22572470529457920 |
18 | 468013463441475840 |
19 | 10124124979606179840 |
[1,18,215,2475,28294,340116,4335596,57773700, 831170736,12532005288,201002619168,3401283910752, 60929911689984,1143429812726400,22572470529457920, 468013463441475840,10124124979606179840] |