n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 14 |
4 | 52 |
5 | 190 |
6 | 700 |
7 | 2574 |
8 | 9476 |
9 | 34878 |
10 | 128396 |
11 | 472654 |
12 | 1739988 |
13 | 6405438 |
14 | 23580508 |
15 | 86807566 |
16 | 319567268 |
17 | 1176432574 |
18 | 4330837036 |
19 | 15943242574 |
20 | 58692346740 |
21 | 216065933246 |
22 | 795410139132 |
23 | 2928167715854 |
24 | 10779553536580 |
[1,4,14,52,190,700,2574,9476,34878,128396,472654, 1739988,6405438,23580508,86807566,319567268, 1176432574,4330837036,15943242574,58692346740, 216065933246,795410139132,2928167715854, 10779553536580] |