# A012025 (b-file synthesized from sequence entry)
1 1
2 -4
3 84
4 -4320
5 418320
6 -66225600
7 15657364800
8 -5187108326400
9 2296766568096000
10 -1310785979158656000
11 937056917610253440000
12 -820081468493365478400000
13 862301491174096979765760000