n | a(n) |
---|---|
1 | 0 |
2 | 7 |
3 | 15 |
4 | 60 |
5 | 222 |
6 | 746 |
7 | 2742 |
8 | 9689 |
9 | 34588 |
10 | 124062 |
11 | 443469 |
12 | 1591177 |
13 | 5710783 |
14 | 20514746 |
15 | 73779819 |
16 | 265523140 |
17 | 956384656 |
18 | 3447285428 |
19 | 12433999199 |
20 | 44877035870 |
21 | 162066465738 |
22 | 585603996081 |
23 | 2117103447068 |
24 | 7657611562951 |
25 | 27710598382843 |
26 | 100320181906860 |
27 | 363337451934873 |
28 | 1316442508560564 |
[0,7,15,60,222,746,2742,9689,34588,124062,443469, 1591177,5710783,20514746,73779819,265523140, 956384656,3447285428,12433999199,44877035870, 162066465738,585603996081,2117103447068, 7657611562951,27710598382843,100320181906860, 363337451934873,1316442508560564] |