n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | 3 |
3 | -10 |
4 | 35 |
5 | -126 |
6 | 462 |
7 | -1716 |
8 | 6435 |
9 | -24310 |
10 | 92378 |
11 | -352716 |
12 | 1352078 |
13 | -5200300 |
14 | 20058300 |
15 | -77558760 |
16 | 300540195 |
17 | -1166803110 |
18 | 4537567650 |
19 | -17672631900 |
20 | 68923264410 |
21 | -269128937220 |
22 | 1052049481860 |
23 | -4116715363800 |
24 | 16123801841550 |
[1,-1,3,-10,35,-126,462,-1716,6435,-24310,92378, -352716,1352078,-5200300,20058300,-77558760, 300540195,-1166803110,4537567650,-17672631900, 68923264410,-269128937220,1052049481860, -4116715363800,16123801841550] |