n | a(n) |
---|---|
0 | 1 |
1 | -3 |
2 | 9 |
3 | -33 |
4 | 145 |
5 | -753 |
6 | 4535 |
7 | -31185 |
8 | 241621 |
9 | -2085977 |
10 | 19878575 |
11 | -207435465 |
12 | 2354040401 |
13 | -28879390741 |
14 | 381015862819 |
15 | -5381312495493 |
16 | 81032586154861 |
17 | -1296239101205321 |
18 | 21956075917991823 |
19 | -392643158131057189 |
20 | 7393747486434743561 |
21 | -146254142534490299853 |
[1,-3,9,-33,145,-753,4535,-31185,241621,-2085977, 19878575,-207435465,2354040401,-28879390741, 381015862819,-5381312495493,81032586154861, -1296239101205321,21956075917991823, -392643158131057189,7393747486434743561, -146254142534490299853] |