n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 9 |
4 | 24 |
5 | 77 |
6 | 295 |
7 | 1329 |
8 | 6934 |
9 | 41351 |
10 | 278680 |
11 | 2101434 |
12 | 17574552 |
13 | 161740316 |
14 | 1626733108 |
15 | 17771416521 |
16 | 209739328924 |
17 | 2661301094008 |
18 | 36148700652163 |
19 | 523597247829867 |
20 | 8059284921781892 |
21 | 131408547139817541 |
[1,2,4,9,24,77,295,1329,6934,41351,278680,2101434, 17574552,161740316,1626733108,17771416521, 209739328924,2661301094008,36148700652163, 523597247829867,8059284921781892, 131408547139817541] |