n | a(n) |
---|---|
3 | 0 |
4 | 2 |
5 | 6 |
6 | 17 |
7 | 49 |
8 | 135 |
9 | 361 |
10 | 951 |
11 | 2493 |
12 | 6497 |
13 | 16837 |
14 | 43498 |
15 | 112164 |
16 | 288741 |
17 | 742294 |
18 | 1906552 |
19 | 4893835 |
20 | 12555662 |
21 | 32201344 |
22 | 82566738 |
23 | 211675672 |
24 | 542621858 |
25 | 1390929877 |
26 | 3565435302 |
27 | 9139718572 |
28 | 23430209922 |
29 | 60069035611 |
30 | 154014868677 |
[0,2,6,17,49,135,361,951,2493,6497,16837,43498, 112164,288741,742294,1906552,4893835,12555662, 32201344,82566738,211675672,542621858,1390929877, 3565435302,9139718572,23430209922,60069035611, 154014868677] |