n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 8 |
3 | 30 |
4 | 112 |
5 | 418 |
6 | 1560 |
7 | 5822 |
8 | 21728 |
9 | 81090 |
10 | 302632 |
11 | 1129438 |
12 | 4215120 |
13 | 15731042 |
14 | 58709048 |
15 | 219105150 |
16 | 817711552 |
17 | 3051741058 |
18 | 11389252680 |
19 | 42505269662 |
20 | 158631825968 |
21 | 592022034210 |
22 | 2209456310872 |
23 | 8245803209278 |
24 | 30773756526240 |
[0,2,8,30,112,418,1560,5822,21728,81090,302632, 1129438,4215120,15731042,58709048,219105150, 817711552,3051741058,11389252680,42505269662, 158631825968,592022034210,2209456310872, 8245803209278,30773756526240] |