n | a(n) |
---|---|
7 | 1 |
8 | 28 |
9 | 546 |
10 | 9450 |
11 | 157773 |
12 | 2637558 |
13 | 44990231 |
14 | 790943153 |
15 | 14409322928 |
16 | 272803210680 |
17 | 5374523477960 |
18 | 110228466184200 |
19 | 2353125040549984 |
20 | 52260903362512720 |
21 | 1206647803780373360 |
22 | 28939583397335447760 |
[1,28,546,9450,157773,2637558,44990231,790943153, 14409322928,272803210680,5374523477960, 110228466184200,2353125040549984, 52260903362512720,1206647803780373360, 28939583397335447760] |