# A002169 (b-file synthesized from sequence entry)
1 0
2 9
3 -18
4 -162
5 2520
6 33192
7 -1019088
8 -7804944
9 723961728
10 2596523904
11 -856142090496
12 6383648984832
13 1356696930401280
14 -27667884260938752
15 -2908030732698175488
16 122264703581556307968
17 7238339805811283361792