n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 11 |
5 | 34 |
6 | 110 |
7 | 350 |
8 | 1147 |
9 | 3800 |
10 | 12836 |
11 | 43929 |
12 | 152285 |
13 | 533205 |
14 | 1883187 |
15 | 6698612 |
16 | 23974179 |
17 | 86258459 |
18 | 311811314 |
19 | 1131863444 |
20 | 4124127216 |
21 | 15078422405 |
22 | 55301519095 |
23 | 203405409935 |
24 | 750122683729 |
25 | 2773048061073 |
26 | 10274442343829 |
27 | 38147288401915 |
[1,0,1,3,11,34,110,350,1147,3800,12836,43929, 152285,533205,1883187,6698612,23974179,86258459, 311811314,1131863444,4124127216,15078422405, 55301519095,203405409935,750122683729, 2773048061073,10274442343829,38147288401915] |