n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 34 |
6 | 135 |
7 | 610 |
8 | 2965 |
9 | 15612 |
10 | 87871 |
11 | 526274 |
12 | 3334850 |
13 | 22270254 |
14 | 156172689 |
15 | 1146640394 |
16 | 8791424549 |
17 | 70227355786 |
18 | 583283741066 |
19 | 5027823752930 |
20 | 44903579626132 |
21 | 414877600876638 |
22 | 3959945232723603 |
23 | 38996757506464858 |
24 | 395749369598406027 |
25 | 4134132167178705732 |
[1,1,3,9,34,135,610,2965,15612,87871,526274, 3334850,22270254,156172689,1146640394,8791424549, 70227355786,583283741066,5027823752930, 44903579626132,414877600876638,3959945232723603, 38996757506464858,395749369598406027, 4134132167178705732] |