n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 14 |
3 | 48 |
4 | 162 |
5 | 547 |
6 | 1842 |
7 | 6206 |
8 | 20906 |
9 | 70438 |
10 | 237326 |
11 | 799629 |
12 | 2694199 |
13 | 9077599 |
14 | 30585239 |
15 | 103051135 |
16 | 347211149 |
17 | 1169861760 |
18 | 3941626163 |
19 | 13280557904 |
20 | 44746308037 |
21 | 150764154490 |
22 | 507971076799 |
23 | 1711511703373 |
24 | 5766612400708 |
25 | 19429501132982 |
26 | 65464000013233 |
[1,4,14,48,162,547,1842,6206,20906,70438,237326, 799629,2694199,9077599,30585239,103051135, 347211149,1169861760,3941626163,13280557904, 44746308037,150764154490,507971076799, 1711511703373,5766612400708,19429501132982, 65464000013233] |