n | a(n) |
---|---|
4 | 1 |
5 | 2 |
6 | 11 |
7 | 48 |
8 | 208 |
9 | 858 |
10 | 3507 |
11 | 14144 |
12 | 56698 |
13 | 226100 |
14 | 898942 |
15 | 3565920 |
16 | 14124496 |
17 | 55887930 |
18 | 220985795 |
19 | 873396480 |
20 | 3450940830 |
21 | 13633173180 |
22 | 53855628554 |
23 | 212750148000 |
24 | 840496068160 |
25 | 3320817060132 |
26 | 13122294166126 |
27 | 51860761615488 |
[1,2,11,48,208,858,3507,14144,56698,226100,898942, 3565920,14124496,55887930,220985795,873396480, 3450940830,13633173180,53855628554,212750148000, 840496068160,3320817060132,13122294166126, 51860761615488] |