# A009187 (b-file synthesized from sequence entry)
0 1
1 -1
2 2
3 -2
4 0
5 8
6 8
7 -184
8 192
9 5568
10 -20480
11 -231552
12 1837696
13 11751296
14 -187743488
15 -596164352
16 22698672128
17 4342886400
18 -3236847570944
19 10035384119296
20 536307107184640
21 -3825733461393408
22 -101121059849109504