n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 6 |
8 | 21 |
9 | 56 |
10 | 126 |
11 | 252 |
12 | 2562 |
13 | 14442 |
14 | 59487 |
15 | 199627 |
16 | 578005 |
17 | 8330800 |
18 | 65056960 |
19 | 363823800 |
20 | 1628423880 |
21 | 6190034016 |
22 | 115452938151 |
23 | 1152005977431 |
24 | 8137667253101 |
25 | 45527993728141 |
26 | 214265281290061 |
27 | 4904624749585886 |
28 | 59578069604921361 |
[1,1,1,1,1,1,1,6,21,56,126,252,2562,14442,59487, 199627,578005,8330800,65056960,363823800, 1628423880,6190034016,115452938151,1152005977431, 8137667253101,45527993728141,214265281290061, 4904624749585886,59578069604921361] |