n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 7 |
5 | 28 |
6 | 131 |
7 | 690 |
8 | 4033 |
9 | 25864 |
10 | 180265 |
11 | 1354458 |
12 | 10898823 |
13 | 93407828 |
14 | 848739867 |
15 | 8143768538 |
16 | 82229315137 |
17 | 871067808272 |
18 | 9654457636241 |
19 | 111688595475634 |
20 | 1345725966256071 |
21 | 16854833617813388 |
22 | 219050429104638707 |
23 | 2949276326665620482 |
24 | 41076923039499915393 |
[0,1,2,7,28,131,690,4033,25864,180265,1354458, 10898823,93407828,848739867,8143768538, 82229315137,871067808272,9654457636241, 111688595475634,1345725966256071, 16854833617813388,219050429104638707, 2949276326665620482,41076923039499915393] |