n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | -1 |
4 | -13 |
5 | -67 |
6 | -285 |
7 | -1119 |
8 | -4215 |
9 | -15505 |
10 | -56239 |
11 | -202309 |
12 | -724499 |
13 | -2589521 |
14 | -9254363 |
15 | -33111969 |
16 | -118725597 |
17 | -426892131 |
18 | -1539965973 |
19 | -5575175319 |
20 | -20260052337 |
21 | -73908397851 |
22 | -270657727593 |
23 | -994938310059 |
[1,1,1,-1,-13,-67,-285,-1119,-4215,-15505,-56239, -202309,-724499,-2589521,-9254363,-33111969, -118725597,-426892131,-1539965973,-5575175319, -20260052337,-73908397851,-270657727593, -994938310059] |