n | a(n) |
---|---|
0 | 2 |
1 | 4 |
2 | 22 |
3 | 100 |
4 | 466 |
5 | 2164 |
6 | 10054 |
7 | 46708 |
8 | 216994 |
9 | 1008100 |
10 | 4683382 |
11 | 21757828 |
12 | 101081458 |
13 | 469599316 |
14 | 2181641638 |
15 | 10135364500 |
16 | 47086382914 |
17 | 218751625156 |
18 | 1016265649366 |
19 | 4721317472932 |
20 | 21934066839826 |
21 | 101900219778100 |
[2,4,22,100,466,2164,10054,46708,216994,1008100, 4683382,21757828,101081458,469599316,2181641638, 10135364500,47086382914,218751625156, 1016265649366,4721317472932,21934066839826, 101900219778100] |