# A012657 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 0
4 12
5 -60
6 90
7 -420
8 19040
9 -245952
10 1660680
11 -12025200
12 266431176
13 -5435780064
14 74009711776
15 -910402889760
16 17440536006400
17 -420186078195584
18 8609810161550016
19 -157606804730862720