n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 76 |
6 | 274 |
7 | 978 |
8 | 3463 |
9 | 12201 |
10 | 42869 |
11 | 150415 |
12 | 527426 |
13 | 1848905 |
14 | 6480722 |
15 | 22715293 |
16 | 79617891 |
17 | 279063942 |
18 | 978133274 |
19 | 3428414441 |
20 | 12016810218 |
21 | 42119714480 |
22 | 147632440224 |
23 | 517461749617 |
24 | 1813738775801 |
25 | 6357278456431 |
[1,2,6,21,76,274,978,3463,12201,42869,150415, 527426,1848905,6480722,22715293,79617891, 279063942,978133274,3428414441,12016810218, 42119714480,147632440224,517461749617, 1813738775801,6357278456431] |