# A009443 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 -1
4 6
5 -11
6 0
7 83
8 -784
9 6921
10 -34560
11 -60281
12 2821632
13 -29132611
14 184690688
15 -208438245
16 -19939461120
17 427918448785
18 -5036475875328
19 22588439158415
20 504121321717760
21 -15853957892902395
22 258254373528797184