# A012568 (b-file synthesized from sequence entry)
0 1
1 0
2 -20
3 -560
4 -7920
5 1034880
6 172569280
7 12339608320
8 -1902800305920
9 -1037015219466240
10 -208832669083243520
11 24402030281141555200
12 43057075784745711636480
13 18939654540025835056496640