n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 4 |
4 | -16 |
5 | -88 |
6 | 64 |
7 | 2496 |
8 | 4096 |
9 | -106624 |
10 | -480896 |
11 | 6875136 |
12 | 54717440 |
13 | -673392640 |
14 | -7775895552 |
15 | 99550288896 |
16 | 1454255472640 |
17 | -21279326830592 |
18 | -360442602684416 |
19 | 6159283224084480 |
20 | 116460747215831040 |
[1,2,4,4,-16,-88,64,2496,4096,-106624,-480896, 6875136,54717440,-673392640,-7775895552, 99550288896,1454255472640,-21279326830592, -360442602684416,6159283224084480, 116460747215831040] |