n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 26 |
5 | 91 |
6 | 302 |
7 | 967 |
8 | 3026 |
9 | 9331 |
10 | 28502 |
11 | 86527 |
12 | 261626 |
13 | 788971 |
14 | 2375102 |
15 | 7141687 |
16 | 21457826 |
17 | 64439011 |
18 | 193448102 |
19 | 580606447 |
20 | 1742343626 |
21 | 5228079451 |
22 | 15686335502 |
23 | 47063200807 |
24 | 141197991026 |
25 | 423610750291 |
26 | 1270865805302 |
27 | 3812664524767 |
28 | 11438127792026 |
[1,1,2,7,26,91,302,967,3026,9331,28502,86527, 261626,788971,2375102,7141687,21457826,64439011, 193448102,580606447,1742343626,5228079451, 15686335502,47063200807,141197991026,423610750291, 1270865805302,3812664524767,11438127792026] |