n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | -4 |
4 | -10 |
5 | -18 |
6 | 112 |
7 | 520 |
8 | -1188 |
9 | -21700 |
10 | 459584 |
11 | 1186704 |
12 | -33320120 |
13 | -917538776 |
14 | 433679040 |
15 | 203262002528 |
16 | 3173401795088 |
17 | -28004721669360 |
18 | -854986923602432 |
19 | -13072356448331840 |
20 | -17371649304775584 |
21 | 4477993621700382176 |
22 | 159817807129635664640 |
[1,1,0,-4,-10,-18,112,520,-1188,-21700,459584, 1186704,-33320120,-917538776,433679040, 203262002528,3173401795088,-28004721669360, -854986923602432,-13072356448331840, -17371649304775584,4477993621700382176, 159817807129635664640] |