n | a(n) |
---|---|
5 | 1 |
6 | 21 |
7 | 124 |
8 | 636 |
9 | 2749 |
10 | 11265 |
11 | 44028 |
12 | 168673 |
13 | 636526 |
14 | 2385703 |
15 | 8903294 |
16 | 33177968 |
17 | 123602040 |
18 | 460821006 |
19 | 1720240295 |
20 | 6432225711 |
21 | 24095079682 |
22 | 90435264009 |
23 | 340097165156 |
24 | 1281506663877 |
25 | 4838093967400 |
26 | 18299480354681 |
27 | 69340086808691 |
28 | 263195643048634 |
[1,21,124,636,2749,11265,44028,168673,636526, 2385703,8903294,33177968,123602040,460821006, 1720240295,6432225711,24095079682,90435264009, 340097165156,1281506663877,4838093967400, 18299480354681,69340086808691,263195643048634] |