n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 9 |
4 | 54 |
5 | 450 |
6 | 4500 |
7 | 55125 |
8 | 771750 |
9 | 12502350 |
10 | 225042300 |
11 | 4538353050 |
12 | 99843767100 |
13 | 2410513805700 |
14 | 62673358948200 |
15 | 1762688220418125 |
16 | 52880646612543750 |
17 | 1698056319002793750 |
18 | 57733914846094987500 |
19 | 2084194325944029048750 |
[1,1,2,9,54,450,4500,55125,771750,12502350, 225042300,4538353050,99843767100,2410513805700, 62673358948200,1762688220418125,52880646612543750, 1698056319002793750,57733914846094987500, 2084194325944029048750] |