n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 19 |
6 | 110 |
7 | 975 |
8 | 13555 |
9 | 297330 |
10 | 10393875 |
11 | 581772345 |
12 | 52349401830 |
13 | 7590091602225 |
14 | 1776029657181945 |
15 | 671331672100911690 |
16 | 410181883162313724165 |
17 | 405259031001185201881755 |
18 | 647603522027573971050913590 |
19 | 1674054699591760033962965879295 |
[1,1,1,2,5,19,110,975,13555,297330,10393875, 581772345,52349401830,7590091602225, 1776029657181945,671331672100911690, 410181883162313724165,405259031001185201881755, 647603522027573971050913590, 1674054699591760033962965879295] |