n | a(n) |
---|---|
0 | 1 |
1 | -4 |
2 | -48 |
3 | -320 |
4 | -1792 |
5 | -9216 |
6 | -45056 |
7 | -212992 |
8 | -983040 |
9 | -4456448 |
10 | -19922944 |
11 | -88080384 |
12 | -385875968 |
13 | -1677721600 |
14 | -7247757312 |
15 | -31138512896 |
16 | -133143986176 |
17 | -566935683072 |
18 | -2405181685760 |
19 | -10170482556928 |
[1,-4,-48,-320,-1792,-9216,-45056,-212992,-983040, -4456448,-19922944,-88080384,-385875968, -1677721600,-7247757312,-31138512896, -133143986176,-566935683072,-2405181685760, -10170482556928] |