n | a(n) |
---|---|
2 | 1 |
3 | 3 |
4 | 18 |
5 | 139 |
6 | 1314 |
7 | 14658 |
8 | 188012 |
9 | 2721462 |
10 | 43837014 |
11 | 777266691 |
12 | 15037898091 |
13 | 315177210360 |
14 | 7112634073455 |
15 | 171930274269408 |
16 | 4431595775955999 |
17 | 121321383915646543 |
18 | 3515347574087951331 |
19 | 107474295428549047272 |
[1,3,18,139,1314,14658,188012,2721462,43837014, 777266691,15037898091,315177210360,7112634073455, 171930274269408,4431595775955999, 121321383915646543,3515347574087951331, 107474295428549047272] |