n | a(n) |
---|---|
4 | 1 |
5 | 10 |
6 | 66 |
7 | 365 |
8 | 1837 |
9 | 8741 |
10 | 40133 |
11 | 179932 |
12 | 793605 |
13 | 3460106 |
14 | 14961664 |
15 | 64306917 |
16 | 275180827 |
17 | 1173714565 |
18 | 4994096327 |
19 | 21211537533 |
20 | 89972566673 |
21 | 381261067469 |
22 | 1614446775255 |
23 | 6832832045575 |
24 | 28908094009481 |
25 | 122272843951891 |
26 | 517095189163181 |
[1,10,66,365,1837,8741,40133,179932,793605, 3460106,14961664,64306917,275180827,1173714565, 4994096327,21211537533,89972566673,381261067469, 1614446775255,6832832045575,28908094009481, 122272843951891,517095189163181] |