n | a(n) |
---|---|
0 | -1 |
1 | -1 |
2 | 0 |
3 | 1 |
4 | 6 |
5 | 29 |
6 | 150 |
7 | 841 |
8 | 5166 |
9 | 34649 |
10 | 252750 |
11 | 1995181 |
12 | 16962726 |
13 | 154624469 |
14 | 1505035350 |
15 | 15583997521 |
16 | 171082318686 |
17 | 1985148989489 |
18 | 24279125761950 |
19 | 312193418011861 |
20 | 4210755676649046 |
21 | 59445878286889709 |
22 | 876726137720576550 |
23 | 13483686390543382201 |
[-1,-1,0,1,6,29,150,841,5166,34649,252750,1995181, 16962726,154624469,1505035350,15583997521, 171082318686,1985148989489,24279125761950, 312193418011861,4210755676649046, 59445878286889709,876726137720576550, 13483686390543382201] |