n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 29 |
4 | 386 |
5 | 6774 |
6 | 146484 |
7 | 3762744 |
8 | 111868560 |
9 | 3777096240 |
10 | 142734788640 |
11 | 5967788097600 |
12 | 273488036169600 |
13 | 13631083378617600 |
14 | 734083968523046400 |
15 | 42477063883483622400 |
16 | 2628184745184816384000 |
17 | 173147202267665649408000 |
18 | 12100888735302910523904000 |
19 | 894183767796064712795136000 |
[0,1,3,29,386,6774,146484,3762744,111868560, 3777096240,142734788640,5967788097600, 273488036169600,13631083378617600, 734083968523046400,42477063883483622400, 2628184745184816384000,173147202267665649408000, 12100888735302910523904000, 894183767796064712795136000] |