# A009619 (b-file synthesized from sequence entry)
0 1
1 -2
2 16
3 -104
4 1600
5 -29952
6 644736
7 -18383616
8 645554176
9 -25645936640
10 1160636121088
11 -60217271582720
12 3462113293664256
13 -212189015619731456
14 13428030504825257984
15 -819223993894210109440
16 36420049717189727485952