n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 6 |
5 | 16 |
6 | 46 |
7 | 126 |
8 | 448 |
9 | 1366 |
10 | 5356 |
11 | 18568 |
12 | 76296 |
13 | 297012 |
14 | 1264264 |
15 | 5412928 |
16 | 23928024 |
17 | 110468806 |
18 | 509578384 |
19 | 2495966844 |
20 | 12051904744 |
21 | 61878848596 |
22 | 312943394336 |
23 | 1670571625528 |
24 | 8836179426416 |
25 | 48794206157176 |
26 | 269194017597376 |
27 | 1533137311902576 |
[1,1,3,6,16,46,126,448,1366,5356,18568,76296, 297012,1264264,5412928,23928024,110468806, 509578384,2495966844,12051904744,61878848596, 312943394336,1670571625528,8836179426416, 48794206157176,269194017597376,1533137311902576] |