n | a(n) |
---|---|
6 | 1 |
7 | 21 |
8 | 322 |
9 | 4536 |
10 | 63273 |
11 | 902055 |
12 | 13339535 |
13 | 206070150 |
14 | 3336118786 |
15 | 56663366760 |
16 | 1009672107080 |
17 | 18861567058880 |
18 | 369012649234384 |
19 | 7551527592063024 |
20 | 161429736530118960 |
21 | 3599979517947607200 |
22 | 83637381699544802976 |
23 | 2021687376910682741568 |
24 | 50779532534302850198976 |
25 | 1323714091579185857760000 |
[1,21,322,4536,63273,902055,13339535,206070150, 3336118786,56663366760,1009672107080, 18861567058880,369012649234384,7551527592063024, 161429736530118960,3599979517947607200, 83637381699544802976,2021687376910682741568, 50779532534302850198976,1323714091579185857760000] |