n | a(n) |
---|---|
1 | 4 |
2 | 17 |
3 | 69 |
4 | 290 |
5 | 1174 |
6 | 4762 |
7 | 20011 |
8 | 84101 |
9 | 340461 |
10 | 1378277 |
11 | 5590589 |
12 | 22676645 |
13 | 95292383 |
14 | 400440122 |
15 | 1682945112 |
16 | 7072978202 |
17 | 28633110562 |
18 | 115913692522 |
19 | 469249565698 |
20 | 1899647488730 |
21 | 7705380235154 |
22 | 31254685366922 |
23 | 126775802093906 |
24 | 514230228456026 |
25 | 2160911540495036 |
[4,17,69,290,1174,4762,20011,84101,340461,1378277, 5590589,22676645,95292383,400440122,1682945112, 7072978202,28633110562,115913692522,469249565698, 1899647488730,7705380235154,31254685366922, 126775802093906,514230228456026,2160911540495036] |