n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 7 |
5 | 35 |
6 | 171 |
7 | 847 |
8 | 5041 |
9 | 32643 |
10 | 223705 |
11 | 1659581 |
12 | 13182159 |
13 | 110802133 |
14 | 984241363 |
15 | 9212696235 |
16 | 90477239521 |
17 | 929604133343 |
18 | 9969157068273 |
19 | 111329454692485 |
20 | 1291932988047775 |
21 | 15550838026589061 |
22 | 193833398512358011 |
23 | 2498039016973836491 |
[1,0,1,3,7,35,171,847,5041,32643,223705,1659581, 13182159,110802133,984241363,9212696235, 90477239521,929604133343,9969157068273, 111329454692485,1291932988047775, 15550838026589061,193833398512358011, 2498039016973836491] |