n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 26 |
4 | 126 |
5 | 742 |
6 | 5166 |
7 | 40462 |
8 | 351742 |
9 | 3458470 |
10 | 37425406 |
11 | 440788702 |
12 | 5633316574 |
13 | 77379974518 |
14 | 1140707915262 |
15 | 18053421105742 |
16 | 302414295475134 |
17 | 5364631473148614 |
18 | 100769601500958078 |
19 | 1988246969908681278 |
20 | 41179474537324087454 |
21 | 896909297854081874454 |
[1,2,6,26,126,742,5166,40462,351742,3458470, 37425406,440788702,5633316574,77379974518, 1140707915262,18053421105742,302414295475134, 5364631473148614,100769601500958078, 1988246969908681278,41179474537324087454, 896909297854081874454] |