n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 7 |
5 | 27 |
6 | 87 |
7 | 409 |
8 | 1657 |
9 | 9089 |
10 | 43833 |
11 | 272947 |
12 | 1515903 |
13 | 10515147 |
14 | 65766991 |
15 | 501178937 |
16 | 3473600465 |
17 | 28773452321 |
18 | 218310229201 |
19 | 1949230218691 |
20 | 16035686850327 |
21 | 153281759047387 |
22 | 1356791248984295 |
23 | 13806215066685433 |
24 | 130660110400259849 |
25 | 1408621900803060705 |
[1,1,3,7,27,87,409,1657,9089,43833,272947,1515903, 10515147,65766991,501178937,3473600465, 28773452321,218310229201,1949230218691, 16035686850327,153281759047387,1356791248984295, 13806215066685433,130660110400259849, 1408621900803060705] |