n | a(n) |
---|---|
2 | 1 |
3 | 5 |
4 | 35 |
5 | 137 |
6 | 844 |
7 | 3237 |
8 | 19289 |
9 | 74075 |
10 | 435901 |
11 | 1681705 |
12 | 9840202 |
13 | 38142908 |
14 | 222555244 |
15 | 866299556 |
16 | 5047109045 |
17 | 19716828587 |
18 | 114778868635 |
19 | 449771556357 |
20 | 2617170238263 |
21 | 10282678191109 |
22 | 59821340594252 |
23 | 235568344161873 |
[1,5,35,137,844,3237,19289,74075,435901,1681705, 9840202,38142908,222555244,866299556,5047109045, 19716828587,114778868635,449771556357, 2617170238263,10282678191109,59821340594252, 235568344161873] |