n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 72 |
3 | 540 |
4 | 4032 |
5 | 29988 |
6 | 223020 |
7 | 1658160 |
8 | 12328596 |
9 | 91662732 |
10 | 681510816 |
11 | 5067014148 |
12 | 37673118252 |
13 | 280098623952 |
14 | 2082525799284 |
15 | 15483523651596 |
16 | 115119584685504 |
17 | 855911035979748 |
18 | 6363675682412076 |
19 | 47313758657548656 |
20 | 351776531372292180 |
21 | 2615449111101347724 |
22 | 19445794254904116960 |
[1,9,72,540,4032,29988,223020,1658160,12328596, 91662732,681510816,5067014148,37673118252, 280098623952,2082525799284,15483523651596, 115119584685504,855911035979748,6363675682412076, 47313758657548656,351776531372292180, 2615449111101347724,19445794254904116960] |