n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 4 |
6 | 8 |
7 | 15 |
8 | 31 |
9 | 66 |
10 | 142 |
11 | 306 |
12 | 678 |
13 | 1512 |
14 | 3410 |
15 | 7750 |
16 | 17786 |
17 | 41067 |
18 | 95514 |
19 | 223295 |
20 | 525203 |
21 | 1240734 |
22 | 2945383 |
23 | 7019239 |
24 | 16795983 |
25 | 40325120 |
26 | 97153672 |
27 | 234753693 |
28 | 568950192 |
[1,1,1,2,4,8,15,31,66,142,306,678,1512,3410,7750, 17786,41067,95514,223295,525203,1240734,2945383, 7019239,16795983,40325120,97153672,234753693, 568950192] |