n | a(n) |
---|---|
3 | 0 |
4 | 0 |
5 | 128 |
6 | 6912 |
7 | 301056 |
8 | 13107200 |
9 | 604661760 |
10 | 30105600000 |
11 | 1625414303744 |
12 | 95105071448064 |
13 | 6014219459788800 |
14 | 409597814515957760 |
15 | 29930757120000000000 |
16 | 2338124811342685667328 |
17 | 194579196865600687702016 |
18 | 17194638200501483392204800 |
19 | 1608612930338829120118456320 |
20 | 158879430213632000000000000000 |
[0,0,128,6912,301056,13107200,604661760, 30105600000,1625414303744,95105071448064, 6014219459788800,409597814515957760, 29930757120000000000,2338124811342685667328, 194579196865600687702016, 17194638200501483392204800, 1608612930338829120118456320, 158879430213632000000000000000] |