n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | -2 |
3 | 12 |
4 | -48 |
5 | 960 |
6 | 11520 |
7 | -483840 |
8 | 3870720 |
9 | -69672960 |
10 | -2786918400 |
11 | 306561024000 |
12 | 7357464576000 |
13 | -1147764473856000 |
14 | -96412215803904000 |
15 | -11569465896468480000 |
16 | 185111454343495680000 |
17 | -50350315581430824960000 |
18 | -1812611360931509698560000 |
[1,1,-2,12,-48,960,11520,-483840,3870720, -69672960,-2786918400,306561024000,7357464576000, -1147764473856000,-96412215803904000, -11569465896468480000,185111454343495680000, -50350315581430824960000, -1812611360931509698560000] |