n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 15 |
6 | 49 |
7 | 180 |
8 | 701 |
9 | 2891 |
10 | 12371 |
11 | 54564 |
12 | 246319 |
13 | 1133602 |
14 | 5300255 |
15 | 25119554 |
16 | 120441076 |
17 | 583373822 |
18 | 2851023191 |
19 | 14044428996 |
20 | 69677569603 |
21 | 347904448580 |
22 | 1747195558582 |
23 | 8820848574074 |
24 | 44747514381341 |
25 | 228004950808983 |
26 | 1166498678253839 |
27 | 5990376960443432 |
[1,1,2,5,15,49,180,701,2891,12371,54564,246319, 1133602,5300255,25119554,120441076,583373822, 2851023191,14044428996,69677569603,347904448580, 1747195558582,8820848574074,44747514381341, 228004950808983,1166498678253839,5990376960443432] |