n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | -1 |
3 | -5 |
4 | -26 |
5 | -154 |
6 | -1044 |
7 | -8028 |
8 | -69264 |
9 | -663696 |
10 | -6999840 |
11 | -80627040 |
12 | -1007441280 |
13 | -13575738240 |
14 | -196287356160 |
15 | -3031488633600 |
16 | -49811492505600 |
17 | -867718162483200 |
18 | -15974614352793600 |
19 | -309920046408806400 |
20 | -6320046028584960000 |
[1,0,-1,-5,-26,-154,-1044,-8028,-69264,-663696, -6999840,-80627040,-1007441280,-13575738240, -196287356160,-3031488633600,-49811492505600, -867718162483200,-15974614352793600, -309920046408806400,-6320046028584960000] |