# A013001 (b-file synthesized from sequence entry)
0 1
1 -4
2 16
3 -544
4 25344
5 -1920384
6 246359040
7 -39508168704
8 9120978370560
9 -2587275558617088
10 939278027083448320
11 -411971792033339539456
12 217927272725489369743360
13 -135949730585003375068184576