n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 18 |
4 | 240 |
5 | 3100 |
6 | 46620 |
7 | 823494 |
8 | 16777152 |
9 | 387420408 |
10 | 9999999900 |
11 | 285311670490 |
12 | 8916100448112 |
13 | 302875106592084 |
14 | 11112006825557820 |
15 | 437893890380859150 |
16 | 18446744073709551360 |
[1,0,0,18,240,3100,46620,823494,16777152, 387420408,9999999900,285311670490,8916100448112, 302875106592084,11112006825557820, 437893890380859150,18446744073709551360] |