n | a(n) |
---|---|
4 | 1 |
5 | 6 |
6 | 30 |
7 | 150 |
8 | 780 |
9 | 4263 |
10 | 24556 |
11 | 149040 |
12 | 951615 |
13 | 6378625 |
14 | 44785620 |
15 | 328660566 |
16 | 2515643767 |
17 | 20044428810 |
18 | 165955025400 |
19 | 1425299331992 |
20 | 12678325080012 |
21 | 116635133853189 |
22 | 1108221018960830 |
23 | 10862073229428120 |
24 | 109694927532209481 |
25 | 1140199081827172719 |
[1,6,30,150,780,4263,24556,149040,951615,6378625, 44785620,328660566,2515643767,20044428810, 165955025400,1425299331992,12678325080012, 116635133853189,1108221018960830, 10862073229428120,109694927532209481, 1140199081827172719] |