n | a(n) |
---|---|
4 | 1 |
5 | 10 |
6 | 50 |
7 | 385 |
8 | 3130 |
9 | 28764 |
10 | 291900 |
11 | 3249210 |
12 | 39367395 |
13 | 515874470 |
14 | 7270929806 |
15 | 109691447395 |
16 | 1763782644020 |
17 | 30114243100760 |
18 | 544123405603800 |
19 | 10373304279494964 |
20 | 208092476689208805 |
21 | 4381794437494059810 |
22 | 96635643877147885450 |
23 | 2227562535558247510885 |
[1,10,50,385,3130,28764,291900,3249210,39367395, 515874470,7270929806,109691447395,1763782644020, 30114243100760,544123405603800,10373304279494964, 208092476689208805,4381794437494059810, 96635643877147885450,2227562535558247510885] |