n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 14 |
4 | 57 |
5 | 222 |
6 | 928 |
7 | 3764 |
8 | 15971 |
9 | 66190 |
10 | 283464 |
11 | 1190628 |
12 | 5131002 |
13 | 21749532 |
14 | 94153056 |
15 | 401757672 |
16 | 1745117091 |
17 | 7484144598 |
18 | 32595240952 |
19 | 140342565620 |
20 | 612526487822 |
21 | 2645723309284 |
22 | 11567425911936 |
23 | 50095161350616 |
24 | 219340900447118 |
[1,4,14,57,222,928,3764,15971,66190,283464, 1190628,5131002,21749532,94153056,401757672, 1745117091,7484144598,32595240952,140342565620, 612526487822,2645723309284,11567425911936, 50095161350616,219340900447118] |