n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 16 |
4 | 72 |
5 | 335 |
6 | 1562 |
7 | 7273 |
8 | 33850 |
9 | 157534 |
10 | 733148 |
11 | 3412005 |
12 | 15879172 |
13 | 73900265 |
14 | 343925312 |
15 | 1600598044 |
16 | 7449042040 |
17 | 34667184251 |
18 | 161338016046 |
19 | 750852888177 |
20 | 3494403076902 |
21 | 16262643529850 |
22 | 75684907767980 |
23 | 352230881365025 |
24 | 1639251436594792 |
25 | 7628931517771089 |
[1,1,4,16,72,335,1562,7273,33850,157534,733148, 3412005,15879172,73900265,343925312,1600598044, 7449042040,34667184251,161338016046,750852888177, 3494403076902,16262643529850,75684907767980, 352230881365025,1639251436594792,7628931517771089] |