n | a(n) |
---|---|
8 | 1 |
9 | 36 |
10 | 870 |
11 | 18150 |
12 | 357423 |
13 | 6926634 |
14 | 135036473 |
15 | 2681453775 |
16 | 54631129553 |
17 | 1146901283528 |
18 | 24871845297936 |
19 | 557921681547048 |
20 | 12953636989943896 |
21 | 311333643161390640 |
22 | 7744654310169576800 |
23 | 199321978221066137360 |
[1,36,870,18150,357423,6926634,135036473, 2681453775,54631129553,1146901283528, 24871845297936,557921681547048,12953636989943896, 311333643161390640,7744654310169576800, 199321978221066137360] |