n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 8 |
3 | 26 |
4 | 76 |
5 | 216 |
6 | 590 |
7 | 1554 |
8 | 3988 |
9 | 9988 |
10 | 24464 |
11 | 58794 |
12 | 138866 |
13 | 322808 |
14 | 739658 |
15 | 1672372 |
16 | 3734848 |
17 | 8245956 |
18 | 18012114 |
19 | 38952586 |
20 | 83448832 |
21 | 177194716 |
22 | 373111970 |
23 | 779430870 |
24 | 1615995262 |
25 | 3326484686 |
26 | 6800794428 |
27 | 13813260736 |
28 | 27881653590 |
29 | 55942340000 |
30 | 111601021856 |
[1,2,8,26,76,216,590,1554,3988,9988,24464,58794, 138866,322808,739658,1672372,3734848,8245956, 18012114,38952586,83448832,177194716,373111970, 779430870,1615995262,3326484686,6800794428, 13813260736,27881653590,55942340000,111601021856] |