n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 37 |
4 | 222 |
5 | 1333 |
6 | 7998 |
7 | 47989 |
8 | 287934 |
9 | 1727605 |
10 | 10365630 |
11 | 62193781 |
12 | 373162686 |
13 | 2238976117 |
14 | 13433856702 |
15 | 80603140213 |
16 | 483618841278 |
17 | 2901713047669 |
18 | 17410278286014 |
19 | 104461669716085 |
20 | 626770018296510 |
21 | 3760620109779061 |
[1,6,37,222,1333,7998,47989,287934,1727605, 10365630,62193781,373162686,2238976117, 13433856702,80603140213,483618841278, 2901713047669,17410278286014,104461669716085, 626770018296510,3760620109779061] |