n | a(n) |
---|---|
5 | 1 |
6 | 9 |
7 | 55 |
8 | 286 |
9 | 1362 |
10 | 6143 |
11 | 26729 |
12 | 113471 |
13 | 473471 |
14 | 1951612 |
15 | 7974660 |
16 | 32384127 |
17 | 130926391 |
18 | 527657073 |
19 | 2121795391 |
20 | 8518575466 |
21 | 34162154550 |
22 | 136893468863 |
23 | 548253828965 |
24 | 2194897467395 |
25 | 8784784672511 |
26 | 35153438973304 |
27 | 140653028240520 |
28 | 562719731644671 |
[1,9,55,286,1362,6143,26729,113471,473471,1951612, 7974660,32384127,130926391,527657073,2121795391, 8518575466,34162154550,136893468863,548253828965, 2194897467395,8784784672511,35153438973304, 140653028240520,562719731644671] |