n | a(n) |
---|---|
1 | 1 |
2 | -2 |
3 | 6 |
4 | -23 |
5 | 102 |
6 | -494 |
7 | 2530 |
8 | -13456 |
9 | 73539 |
10 | -410282 |
11 | 2326674 |
12 | -13371039 |
13 | 77697536 |
14 | -455749550 |
15 | 2694915548 |
16 | -16047294182 |
17 | 96143497559 |
18 | -579147165864 |
19 | 3505497238320 |
20 | -21309996083015 |
21 | 130048125280624 |
[1,-2,6,-23,102,-494,2530,-13456,73539,-410282, 2326674,-13371039,77697536,-455749550,2694915548, -16047294182,96143497559,-579147165864, 3505497238320,-21309996083015,130048125280624] |