n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 27 |
4 | 134 |
5 | 709 |
6 | 3892 |
7 | 22004 |
8 | 127250 |
9 | 749230 |
10 | 4476386 |
11 | 27071344 |
12 | 165398868 |
13 | 1019405720 |
14 | 6330482488 |
15 | 39571612357 |
16 | 248796862550 |
17 | 1572300095758 |
18 | 9981970108384 |
19 | 63633339713190 |
20 | 407162295120570 |
21 | 2614059813642256 |
22 | 16834457481559076 |
[1,1,6,27,134,709,3892,22004,127250,749230, 4476386,27071344,165398868,1019405720,6330482488, 39571612357,248796862550,1572300095758, 9981970108384,63633339713190,407162295120570, 2614059813642256,16834457481559076] |