n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 10 |
4 | 42 |
5 | 204 |
6 | 1127 |
7 | 6924 |
8 | 46704 |
9 | 342167 |
10 | 2700295 |
11 | 22799218 |
12 | 204799885 |
13 | 1947993126 |
14 | 19540680497 |
15 | 206001380039 |
16 | 2275381566909 |
17 | 26261810071925 |
18 | 315969045744894 |
19 | 3954454344433658 |
20 | 51382626410402336 |
21 | 691956435942841207 |
[1,3,10,42,204,1127,6924,46704,342167,2700295, 22799218,204799885,1947993126,19540680497, 206001380039,2275381566909,26261810071925, 315969045744894,3954454344433658, 51382626410402336,691956435942841207] |