n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 14 |
5 | 52 |
6 | 204 |
7 | 840 |
8 | 3574 |
9 | 15588 |
10 | 69332 |
11 | 313272 |
12 | 1433964 |
13 | 6635400 |
14 | 30988312 |
15 | 145871248 |
16 | 691403686 |
17 | 3296979524 |
18 | 15805913476 |
19 | 76135613784 |
20 | 368304184900 |
21 | 1788518253080 |
22 | 8715477003688 |
23 | 42605364060656 |
24 | 208878870197436 |
25 | 1026781984000680 |
26 | 5059692979338824 |
27 | 24989145569112880 |
28 | 123676728224877464 |
29 | 613295203581498768 |
30 | 3046761116509464624 |
[1,2,4,14,52,204,840,3574,15588,69332,313272, 1433964,6635400,30988312,145871248,691403686, 3296979524,15805913476,76135613784,368304184900, 1788518253080,8715477003688,42605364060656, 208878870197436,1026781984000680,5059692979338824, 24989145569112880,123676728224877464, 613295203581498768,3046761116509464624] |