# A012563 (b-file synthesized from sequence entry)
0 1
1 0
2 12
3 -120
4 8400
5 -600000
6 73313856
7 -12123226752
8 2695239655680
9 -769790431168512
10 275082505104161792
11 -120207067043213252608
12 63066575428691877122048
13 -39120958138480154972405760