n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 66 |
3 | 860 |
4 | 11970 |
5 | 172116 |
6 | 2523444 |
7 | 37487736 |
8 | 562303170 |
9 | 8496977060 |
10 | 129153866556 |
11 | 1972531074696 |
12 | 30245473774516 |
13 | 465314970745800 |
14 | 7179145222818600 |
15 | 111037445957810160 |
16 | 1721080411744977090 |
[1,6,66,860,11970,172116,2523444,37487736, 562303170,8496977060,129153866556,1972531074696, 30245473774516,465314970745800,7179145222818600, 111037445957810160,1721080411744977090] |