n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 4 |
4 | 64 |
5 | 1152 |
6 | 34372 |
7 | 1335008 |
8 | 69599744 |
9 | 4577345152 |
10 | 374491314176 |
11 | 37154032517376 |
12 | 4402467119882240 |
13 | 613680867638476800 |
14 | 99443966100565999872 |
15 | 18534733913629064343552 |
16 | 3937496200758879526977536 |
17 | 945776134421421651222708224 |
18 | 255043190756805184245158084608 |
[1,0,1,4,64,1152,34372,1335008,69599744, 4577345152,374491314176,37154032517376, 4402467119882240,613680867638476800, 99443966100565999872,18534733913629064343552, 3937496200758879526977536, 945776134421421651222708224, 255043190756805184245158084608] |