n | a(n) |
---|---|
0 | -1 |
1 | -2 |
2 | -4 |
3 | -4 |
4 | 24 |
5 | 236 |
6 | 1448 |
7 | 7640 |
8 | 37424 |
9 | 175436 |
10 | 798984 |
11 | 3565448 |
12 | 15672656 |
13 | 68098936 |
14 | 293196944 |
15 | 1253020976 |
16 | 5322318944 |
17 | 22491436556 |
18 | 94632958664 |
19 | 396682105256 |
20 | 1657418948624 |
21 | 6905368852136 |
22 | 28697991157424 |
23 | 119000162557136 |
[-1,-2,-4,-4,24,236,1448,7640,37424,175436,798984, 3565448,15672656,68098936,293196944,1253020976, 5322318944,22491436556,94632958664,396682105256, 1657418948624,6905368852136,28697991157424, 119000162557136] |