n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 19 |
4 | 135 |
5 | 1171 |
6 | 11823 |
7 | 136459 |
8 | 1771815 |
9 | 25561891 |
10 | 405658143 |
11 | 7022891899 |
12 | 131714587095 |
13 | 2660335742611 |
14 | 57570797744463 |
15 | 1328913670495339 |
16 | 32592691757283975 |
17 | 846383665814211331 |
18 | 23200396829832102783 |
[0,1,3,19,135,1171,11823,136459,1771815,25561891, 405658143,7022891899,131714587095,2660335742611, 57570797744463,1328913670495339,32592691757283975, 846383665814211331,23200396829832102783] |