n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 14 |
4 | 136 |
5 | 782 |
6 | 23360 |
7 | 137258 |
8 | 4210816 |
9 | 64576643 |
10 | 2500000768 |
11 | 28531167062 |
12 | 2229573502976 |
13 | 25239592216022 |
14 | 1852001137606656 |
15 | 54736740117685528 |
16 | 2305878194659557376 |
17 | 51702516367896047762 |
18 | 6557734713069408616448 |
19 | 109912203092239643840222 |
[1,4,14,136,782,23360,137258,4210816,64576643, 2500000768,28531167062,2229573502976, 25239592216022,1852001137606656,54736740117685528, 2305878194659557376,51702516367896047762, 6557734713069408616448,109912203092239643840222] |