n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 4 |
4 | 11 |
5 | 29 |
6 | 81 |
7 | 235 |
8 | 685 |
9 | 1986 |
10 | 5739 |
11 | 16577 |
12 | 47904 |
13 | 138472 |
14 | 400285 |
15 | 1157071 |
16 | 3344567 |
17 | 9667590 |
18 | 27944604 |
19 | 80775310 |
20 | 233485250 |
21 | 674901117 |
22 | 1950836005 |
23 | 5638990526 |
24 | 16299788815 |
25 | 47115369056 |
26 | 136189372297 |
27 | 393662311506 |
28 | 1137900943868 |
29 | 3289160582291 |
30 | 9507486039274 |
[0,1,4,11,29,81,235,685,1986,5739,16577,47904, 138472,400285,1157071,3344567,9667590,27944604, 80775310,233485250,674901117,1950836005, 5638990526,16299788815,47115369056,136189372297, 393662311506,1137900943868,3289160582291, 9507486039274] |