n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 26 |
4 | 74 |
5 | 210 |
6 | 596 |
7 | 1692 |
8 | 4804 |
9 | 13640 |
10 | 38728 |
11 | 109960 |
12 | 312208 |
13 | 886448 |
14 | 2516880 |
15 | 7146144 |
16 | 20289952 |
17 | 57608992 |
18 | 163568448 |
19 | 464417728 |
20 | 1318615104 |
21 | 3743926400 |
22 | 10630080640 |
23 | 30181847168 |
24 | 85694918912 |
25 | 243312448256 |
26 | 690833811712 |
27 | 1961475291648 |
28 | 5569190816256 |
[1,3,9,26,74,210,596,1692,4804,13640,38728,109960, 312208,886448,2516880,7146144,20289952,57608992, 163568448,464417728,1318615104,3743926400, 10630080640,30181847168,85694918912,243312448256, 690833811712,1961475291648,5569190816256] |