n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 10 |
4 | 63 |
5 | 521 |
6 | 5295 |
7 | 64048 |
8 | 907199 |
9 | 14717173 |
10 | 270429934 |
11 | 5561319631 |
12 | 126824201866 |
13 | 3183127838869 |
14 | 87328494060529 |
15 | 2604069098659922 |
16 | 83975195990867113 |
17 | 2915521294244073351 |
18 | 108553405498985038390 |
19 | 4319110373993534510736 |
20 | 183057722816741327269600 |
[1,1,2,10,63,521,5295,64048,907199,14717173, 270429934,5561319631,126824201866,3183127838869, 87328494060529,2604069098659922,83975195990867113, 2915521294244073351,108553405498985038390, 4319110373993534510736,183057722816741327269600] |