n | a(n) |
---|---|
1 | -1 |
2 | -3 |
3 | -1 |
4 | 45 |
5 | 359 |
6 | 2037 |
7 | 10079 |
8 | 46365 |
9 | 204119 |
10 | 873477 |
11 | 3666959 |
12 | 15191085 |
13 | 62342279 |
14 | 254119317 |
15 | 1030760639 |
16 | 4165958205 |
17 | 16792710839 |
18 | 67557739557 |
19 | 271392171119 |
20 | 1089053371725 |
21 | 4366669645799 |
22 | 17498051254197 |
23 | 70086331418399 |
24 | 280627721655645 |
[-1,-3,-1,45,359,2037,10079,46365,204119,873477, 3666959,15191085,62342279,254119317,1030760639, 4165958205,16792710839,67557739557,271392171119, 1089053371725,4366669645799,17498051254197, 70086331418399,280627721655645] |