n | a(n) |
---|---|
1 | 2 |
2 | 9 |
3 | 60 |
4 | 580 |
5 | 7170 |
6 | 108402 |
7 | 1934856 |
8 | 39808584 |
9 | 927352710 |
10 | 24123618310 |
11 | 693066874236 |
12 | 21793557008028 |
13 | 744461976979994 |
14 | 27451268150267850 |
15 | 1086741065393740560 |
16 | 45971289976043485456 |
17 | 2069440771476789080334 |
[2,9,60,580,7170,108402,1934856,39808584, 927352710,24123618310,693066874236,21793557008028, 744461976979994,27451268150267850, 1086741065393740560,45971289976043485456, 2069440771476789080334] |