n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 18 |
4 | 157 |
5 | 1776 |
6 | 24687 |
7 | 407464 |
8 | 7792857 |
9 | 169594560 |
10 | 4141165051 |
11 | 112178655744 |
12 | 3339749183157 |
13 | 108422228887168 |
14 | 3812520677598375 |
15 | 144372964560581376 |
16 | 5858088633723823153 |
17 | 253575577033176047616 |
18 | 11664031615012086920307 |
19 | 568166632439929892761600 |
[1,1,3,18,157,1776,24687,407464,7792857,169594560, 4141165051,112178655744,3339749183157, 108422228887168,3812520677598375, 144372964560581376,5858088633723823153, 253575577033176047616,11664031615012086920307, 568166632439929892761600] |