n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 32 |
6 | 122 |
7 | 422 |
8 | 1222 |
9 | 3302 |
10 | 9021 |
11 | 24558 |
12 | 69453 |
13 | 198750 |
14 | 569814 |
15 | 1618526 |
16 | 4609110 |
17 | 13012670 |
18 | 36977018 |
19 | 104466558 |
20 | 297190402 |
21 | 840584030 |
22 | 2392121298 |
23 | 6764980670 |
24 | 19248138770 |
25 | 54423938014 |
26 | 154841629474 |
27 | 437824909566 |
[1,2,4,10,32,122,422,1222,3302,9021,24558,69453, 198750,569814,1618526,4609110,13012670,36977018, 104466558,297190402,840584030,2392121298, 6764980670,19248138770,54423938014,154841629474, 437824909566] |