# A012779 (b-file synthesized from sequence entry)
0 1
1 0
2 -1
3 3
4 -18
5 60
6 -180
7 -1050
8 24192
9 -308952
10 3131760
11 -23742840
12 62587272
13 2606501040
14 -75839636600
15 1415140435800
16 -20144425867712
17 187207018203392
18 730860552463104
19 -93674690778135744