n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 4 |
5 | 28 |
6 | 550 |
7 | 28456 |
8 | 4134861 |
9 | 1781622569 |
10 | 2407100396065 |
11 | 10660643722901700 |
12 | 159393017165624876022 |
13 | 8189716815725538561261887 |
[1,1,1,4,28,550,28456,4134861,1781622569, 2407100396065,10660643722901700, 159393017165624876022,8189716815725538561261887] |