n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 6 |
4 | 25 |
5 | 150 |
6 | 1561 |
7 | 16926 |
8 | 181945 |
9 | 2286150 |
10 | 34082521 |
11 | 548528046 |
12 | 9363855865 |
13 | 174531124950 |
14 | 3547114323481 |
15 | 76969474578366 |
16 | 1771884893993785 |
17 | 43405229295464550 |
18 | 1128511554418948441 |
19 | 30949983774936839886 |
[0,0,1,6,25,150,1561,16926,181945,2286150, 34082521,548528046,9363855865,174531124950, 3547114323481,76969474578366,1771884893993785, 43405229295464550,1128511554418948441, 30949983774936839886] |