n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 30 |
3 | 114 |
4 | 438 |
5 | 1542 |
6 | 5754 |
7 | 19574 |
8 | 71958 |
9 | 233574 |
10 | 870666 |
11 | 2696274 |
12 | 10375770 |
13 | 30198116 |
14 | 122634404 |
15 | 327024444 |
16 | 1460721616 |
17 | 3347244554 |
18 | 17795165832 |
[1,6,30,114,438,1542,5754,19574,71958,233574, 870666,2696274,10375770,30198116,122634404, 327024444,1460721616,3347244554,17795165832] |