n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 22 |
4 | 218 |
5 | 3028 |
6 | 55540 |
7 | 1235526 |
8 | 32434108 |
9 | 980179566 |
10 | 33522177088 |
11 | 1279935820810 |
12 | 53970628896500 |
13 | 2490952020480012 |
14 | 124903451391713412 |
15 | 6761440164391403896 |
16 | 393008709559373134184 |
17 | 24412776311194951680016 |
18 | 1613955767240361647220648 |
19 | 113146793787569865523200018 |
20 | 8384177419658944198600637096 |
[1,4,22,218,3028,55540,1235526,32434108,980179566, 33522177088,1279935820810,53970628896500, 2490952020480012,124903451391713412, 6761440164391403896,393008709559373134184, 24412776311194951680016,1613955767240361647220648, 113146793787569865523200018, 8384177419658944198600637096] |