n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 2240 |
4 | 98280 |
5 | 1790208 |
6 | 19138560 |
7 | 141920640 |
8 | 805208040 |
9 | 3723722240 |
10 | 14651449344 |
11 | 50573436480 |
12 | 156717687840 |
13 | 443691198720 |
14 | 1162883174400 |
15 | 2851049534592 |
16 | 6596666916840 |
17 | 14509544394240 |
18 | 30507984568320 |
[1,0,0,2240,98280,1790208,19138560,141920640, 805208040,3723722240,14651449344,50573436480, 156717687840,443691198720,1162883174400, 2851049534592,6596666916840,14509544394240, 30507984568320] |