# A009386 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 2
4 -6
5 16
6 -72
7 272
8 -1456
9 7936
10 -47104
11 353792
12 -2390784
13 22368256
14 -180612096
15 1903757312
16 -18625189888
17 209865342976
18 -2431403622400
19 29088885112832
20 -384624656646144
21 4951498053124096
22 -72343735465672704