# A012401 (b-file synthesized from sequence entry)
0 0
1 0
2 2
3 -3
4 0
5 -10
6 328
7 -2184
8 5040
9 -40104
10 1311552
11 -15123240
12 72848160
13 -748098000
14 27513786480
15 -450798649560
16 3381295357440
17 -44199243856320
18 1837919010900480
19 -39019174967975040
20 402216681934690560