n | a(n) |
---|---|
1 | 2 |
2 | 4 |
3 | 7 |
4 | 18 |
5 | 41 |
6 | 119 |
7 | 295 |
8 | 825 |
9 | 2060 |
10 | 5873 |
11 | 15234 |
12 | 42492 |
13 | 111787 |
14 | 313666 |
15 | 836575 |
16 | 2327389 |
17 | 6276477 |
18 | 17477473 |
19 | 47431027 |
20 | 131755956 |
21 | 359950638 |
22 | 999799707 |
23 | 2741682652 |
24 | 7613006585 |
25 | 20955577878 |
26 | 58193926348 |
27 | 160583108286 |
28 | 446091089120 |
[2,4,7,18,41,119,295,825,2060,5873,15234,42492, 111787,313666,836575,2327389,6276477,17477473, 47431027,131755956,359950638,999799707,2741682652, 7613006585,20955577878,58193926348,160583108286, 446091089120] |