n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 3 |
4 | 12 |
5 | 45 |
6 | 126 |
7 | 343 |
8 | 848 |
9 | 2034 |
10 | 4700 |
11 | 10648 |
12 | 23652 |
13 | 51935 |
14 | 112798 |
15 | 243120 |
16 | 520592 |
17 | 1109063 |
18 | 2352366 |
19 | 4971426 |
20 | 10473220 |
21 | 22003464 |
22 | 46115300 |
23 | 96440127 |
24 | 201288792 |
25 | 419381450 |
26 | 872351896 |
27 | 1811858058 |
28 | 3757992280 |
29 | 7784495839 |
30 | 16105959240 |
31 | 33285784442 |
[0,0,0,3,12,45,126,343,848,2034,4700,10648,23652, 51935,112798,243120,520592,1109063,2352366, 4971426,10473220,22003464,46115300,96440127, 201288792,419381450,872351896,1811858058, 3757992280,7784495839,16105959240,33285784442] |