n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 12 |
4 | 108 |
5 | 1380 |
6 | 22440 |
7 | 446040 |
8 | 10461360 |
9 | 282970800 |
10 | 8670594240 |
11 | 296850597120 |
12 | 11230473925440 |
13 | 465262142304960 |
14 | 20948652798353280 |
15 | 1018583225567107200 |
16 | 53190962586022060800 |
17 | 2969038807022050963200 |
18 | 176410305542414738995200 |
19 | 11116489894884127122969600 |
[1,2,12,108,1380,22440,446040,10461360,282970800, 8670594240,296850597120,11230473925440, 465262142304960,20948652798353280, 1018583225567107200,53190962586022060800, 2969038807022050963200,176410305542414738995200, 11116489894884127122969600] |