n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 26 |
5 | 130 |
6 | 782 |
7 | 5477 |
8 | 43823 |
9 | 394415 |
10 | 3944157 |
11 | 43385731 |
12 | 520628778 |
13 | 6768174123 |
14 | 94754437735 |
15 | 1421316566034 |
16 | 22741065056549 |
17 | 386598105961333 |
18 | 6958765907303999 |
19 | 132216552238775996 |
20 | 2644331044775519933 |
[1,2,6,26,130,782,5477,43823,394415,3944157, 43385731,520628778,6768174123,94754437735, 1421316566034,22741065056549,386598105961333, 6958765907303999,132216552238775996, 2644331044775519933] |