n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 14 |
4 | 96 |
5 | 362 |
6 | 3886 |
7 | 25286 |
8 | 151808 |
9 | 2489450 |
10 | 14280474 |
11 | 124799006 |
12 | 1960723254 |
13 | 20231550926 |
14 | 156250567050 |
15 | 1461001415354 |
16 | 40509753514368 |
17 | 310787396790506 |
18 | 3485943793554442 |
19 | 33604044850975838 |
[1,2,4,14,96,362,3886,25286,151808,2489450, 14280474,124799006,1960723254,20231550926, 156250567050,1461001415354,40509753514368, 310787396790506,3485943793554442, 33604044850975838] |