# A179281 (b-file synthesized from sequence entry)
0 0
1 0
2 2
3 -3
4 -56
5 720
6 360
7 -175770
8 2811520
9 27714960
10 -2332820800
11 36227931300
12 1242856742400
13 -79410400212000
14 881326533651200
15 97641790837227000
16 -5371510570250240000
17 7482518858066928000
18 12885336165384393984000