n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 4 |
4 | 33 |
5 | 300 |
6 | 3412 |
7 | 40770 |
8 | 518043 |
9 | 6830545 |
10 | 92909684 |
11 | 1295151600 |
12 | 18426823044 |
13 | 266696759064 |
14 | 3916798516462 |
15 | 58253090490630 |
16 | 875948658280305 |
17 | 13299481192954961 |
18 | 203661940884670135 |
19 | 3142707632566279222 |
20 | 48829032430870168660 |
21 | 763383551090733489744 |
[1,1,1,4,33,300,3412,40770,518043,6830545, 92909684,1295151600,18426823044,266696759064, 3916798516462,58253090490630,875948658280305, 13299481192954961,203661940884670135, 3142707632566279222,48829032430870168660, 763383551090733489744] |