n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | -1 |
4 | -8 |
5 | -45 |
6 | -221 |
7 | -1014 |
8 | -4472 |
9 | -19227 |
10 | -81224 |
11 | -338767 |
12 | -1399320 |
13 | -5736705 |
14 | -23377770 |
15 | -94804944 |
16 | -382930847 |
17 | -1541565610 |
18 | -6188513994 |
19 | -24784429501 |
20 | -99058333803 |
21 | -395227906723 |
22 | -1574536914951 |
23 | -6264614281978 |
24 | -24896955293210 |
25 | -98848880984490 |
[0,0,-1,-8,-45,-221,-1014,-4472,-19227,-81224, -338767,-1399320,-5736705,-23377770,-94804944, -382930847,-1541565610,-6188513994,-24784429501, -99058333803,-395227906723,-1574536914951, -6264614281978,-24896955293210,-98848880984490] |