n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | -4 |
4 | 15 |
5 | -56 |
6 | 210 |
7 | -792 |
8 | 3003 |
9 | -11440 |
10 | 43758 |
11 | -167960 |
12 | 646646 |
13 | -2496144 |
14 | 9657700 |
15 | -37442160 |
16 | 145422675 |
17 | -565722720 |
18 | 2203961430 |
19 | -8597496600 |
20 | 33578000610 |
21 | -131282408400 |
22 | 513791607420 |
23 | -2012616400080 |
[1,1,1,-4,15,-56,210,-792,3003,-11440,43758, -167960,646646,-2496144,9657700,-37442160, 145422675,-565722720,2203961430,-8597496600, 33578000610,-131282408400,513791607420, -2012616400080] |