n | a(n) |
---|---|
0 | 1 |
1 | 19 |
2 | 209 |
3 | 1710 |
4 | 11495 |
5 | 66880 |
6 | 347681 |
7 | 1649637 |
8 | 7252300 |
9 | 29875505 |
10 | 116319938 |
11 | 430976031 |
12 | 1527928814 |
13 | 5206792965 |
14 | 17119704425 |
15 | 54484060983 |
16 | 168297474675 |
17 | 505762373795 |
18 | 1481733152790 |
19 | 4239676354650 |
20 | 11866652524496 |
21 | 32536693623850 |
[1,19,209,1710,11495,66880,347681,1649637,7252300, 29875505,116319938,430976031,1527928814, 5206792965,17119704425,54484060983,168297474675, 505762373795,1481733152790,4239676354650, 11866652524496,32536693623850] |