n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 25 |
4 | 126 |
5 | 704 |
6 | 4183 |
7 | 25897 |
8 | 165166 |
9 | 1077520 |
10 | 7156352 |
11 | 48222354 |
12 | 328859011 |
13 | 2265428728 |
14 | 15740837575 |
15 | 110187356134 |
16 | 776336572878 |
17 | 5501042194580 |
18 | 39177463572112 |
19 | 280277949384146 |
20 | 2013277273220064 |
21 | 14514764553512488 |
22 | 104993261648226446 |
[1,2,6,25,126,704,4183,25897,165166,1077520, 7156352,48222354,328859011,2265428728,15740837575, 110187356134,776336572878,5501042194580, 39177463572112,280277949384146,2013277273220064, 14514764553512488,104993261648226446] |